diff --git a/config/install/search_api_solr.solr_field_type.m_text_und_5_2_0.yml b/config/install/search_api_solr.solr_field_type.m_text_und_5_2_0.yml
index 7d96e24..7e74e4a 100644
--- a/config/install/search_api_solr.solr_field_type.m_text_und_5_2_0.yml
+++ b/config/install/search_api_solr.solr_field_type.m_text_und_5_2_0.yml
@@ -27,7 +27,7 @@ field_type:
         -
           class: solr.ManagedStopFilterFactory
           managed: stopwords
-  #        ignoreCase: true
+  #        ignoreCase: 'true'
         -
           class: solr.WordDelimiterFilterFactory
           catenateNumbers: 1
@@ -62,12 +62,12 @@ field_type:
         -
           class: solr.ManagedSynonymFilterFactory
           managed: synonyms
-          expand: true
-  #        ignoreCase: true
+          expand: 'true'
+  #        ignoreCase: 'true'
         -
           class: solr.ManagedStopFilterFactory
           managed: stopwords
-  #        ignoreCase: true
+  #        ignoreCase: 'true'
         -
           class: solr.WordDelimiterFilterFactory
           catenateNumbers: 0
diff --git a/config/install/search_api_solr.solr_field_type.text_phonetic_und_7_0_0.yml b/config/install/search_api_solr.solr_field_type.text_phonetic_und_7_0_0.yml
index 83fbc03..fb9580a 100644
--- a/config/install/search_api_solr.solr_field_type.text_phonetic_und_7_0_0.yml
+++ b/config/install/search_api_solr.solr_field_type.text_phonetic_und_7_0_0.yml
@@ -22,7 +22,7 @@ field_type:
       filters:
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_phonetic_und.txt
         -
           class: solr.WordDelimiterGraphFilterFactory
@@ -45,7 +45,7 @@ field_type:
           languageSet: auto
           nameType: GENERIC
           ruleType: APPROX
-          concat: true
+          concat: 'true'
         -
           class: solr.RemoveDuplicatesTokenFilterFactory
     -
@@ -55,7 +55,7 @@ field_type:
       filters:
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_phonetic_und.txt
         -
           class: solr.WordDelimiterGraphFilterFactory
@@ -78,7 +78,7 @@ field_type:
           languageSet: auto
           nameType: GENERIC
           ruleType: APPROX
-          concat: true
+          concat: 'true'
         -
           class: solr.RemoveDuplicatesTokenFilterFactory
 solr_configs: {}
diff --git a/config/install/search_api_solr.solr_field_type.text_und_4_5_0.yml b/config/install/search_api_solr.solr_field_type.text_und_4_5_0.yml
index 4958c0d..d30264d 100644
--- a/config/install/search_api_solr.solr_field_type.text_und_4_5_0.yml
+++ b/config/install/search_api_solr.solr_field_type.text_und_4_5_0.yml
@@ -26,7 +26,7 @@ field_type:
       filters:
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords.txt
         -
           class: solr.WordDelimiterFilterFactory
@@ -62,11 +62,11 @@ field_type:
         -
           class: solr.SynonymFilterFactory
           synonyms: synonyms.txt
-          expand: true
-          ignoreCase: true
+          expand: 'true'
+          ignoreCase: 'true'
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords.txt
         -
           class: solr.WordDelimiterFilterFactory
diff --git a/config/install/search_api_solr.solr_field_type.text_und_7_0_0.yml b/config/install/search_api_solr.solr_field_type.text_und_7_0_0.yml
index 83277bb..c7445c3 100644
--- a/config/install/search_api_solr.solr_field_type.text_und_7_0_0.yml
+++ b/config/install/search_api_solr.solr_field_type.text_und_7_0_0.yml
@@ -26,7 +26,7 @@ field_type:
       filters:
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords.txt
         -
           class: solr.WordDelimiterGraphFilterFactory
@@ -62,11 +62,11 @@ field_type:
         -
           class: solr.SynonymFilterFactory
           synonyms: synonyms.txt
-          expand: true
-          ignoreCase: true
+          expand: 'true'
+          ignoreCase: 'true'
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords.txt
         -
           class: solr.WordDelimiterGraphFilterFactory
diff --git a/config/optional/search_api_solr.solr_field_type.m_text_de_5_2_0.yml b/config/optional/search_api_solr.solr_field_type.m_text_de_5_2_0.yml
index 2b1f00c..dfa7601 100644
--- a/config/optional/search_api_solr.solr_field_type.m_text_de_5_2_0.yml
+++ b/config/optional/search_api_solr.solr_field_type.m_text_de_5_2_0.yml
@@ -49,11 +49,11 @@ field_type:
   #        minWordSize: 5
   #        minSubwordSize: 4
   #        maxSubwordSize: 15
-  #        onlyLongestMatch: false
+  #        onlyLongestMatch: 'false'
         -
           class: solr.ManagedStopFilterFactory
           managed: stopwords_de
-  #        ignoreCase: true
+  #        ignoreCase: 'true'
         # GermanNormalizationFilter is not needed if German2 Porter stemmer is
         # used.
         #-
@@ -92,12 +92,12 @@ field_type:
         -
           class: solr.ManagedSynonymFilterFactory
           managed: synonyms_de
-  #        expand: true
-  #        ignoreCase: true
+  #        expand: 'true'
+  #        ignoreCase: 'true'
         -
           class: solr.ManagedStopFilterFactory
           managed: stopwords_de
-  #        ignoreCase: true
+  #        ignoreCase: 'true'
         # GermanNormalizationFilter is not needed if German2 Porter stemmer is
         # used.
         #-
diff --git a/config/optional/search_api_solr.solr_field_type.m_text_de_7_0_0.yml b/config/optional/search_api_solr.solr_field_type.m_text_de_7_0_0.yml
index 543a7ed..9a9d3ff 100644
--- a/config/optional/search_api_solr.solr_field_type.m_text_de_7_0_0.yml
+++ b/config/optional/search_api_solr.solr_field_type.m_text_de_7_0_0.yml
@@ -49,11 +49,11 @@ field_type:
   #        minWordSize: 5
   #        minSubwordSize: 4
   #        maxSubwordSize: 15
-  #        onlyLongestMatch: false
+  #        onlyLongestMatch: 'false'
         -
           class: solr.ManagedStopFilterFactory
           managed: stopwords_de
-  #        ignoreCase: true
+  #        ignoreCase: 'true'
         # GermanNormalizationFilter is not needed if German2 Porter stemmer is
         # used.
         #-
@@ -92,12 +92,12 @@ field_type:
         -
           class: solr.ManagedSynonymFilterFactory
           managed: synonyms_de
-  #        expand: true
-  #        ignoreCase: true
+  #        expand: 'true'
+  #        ignoreCase: 'true'
         -
           class: solr.ManagedStopFilterFactory
           managed: stopwords_de
-  #        ignoreCase: true
+  #        ignoreCase: 'true'
         # GermanNormalizationFilter is not needed if German2 Porter stemmer is
         # used.
         #-
diff --git a/config/optional/search_api_solr.solr_field_type.m_text_en_5_2_0.yml b/config/optional/search_api_solr.solr_field_type.m_text_en_5_2_0.yml
index d6dd92a..f96768c 100644
--- a/config/optional/search_api_solr.solr_field_type.m_text_en_5_2_0.yml
+++ b/config/optional/search_api_solr.solr_field_type.m_text_en_5_2_0.yml
@@ -30,7 +30,7 @@ field_type:
         -
           class: solr.ManagedStopFilterFactory
           managed: stopwords_en
-  #        ignoreCase: true
+  #        ignoreCase: 'true'
         -
           class: solr.WordDelimiterFilterFactory
           catenateNumbers: 1
@@ -65,12 +65,12 @@ field_type:
         -
           class: solr.ManagedSynonymFilterFactory
           managed: synonyms_en
-          expand: true
-  #        ignoreCase: true
+          expand: 'true'
+  #        ignoreCase: 'true'
         -
           class: solr.ManagedStopFilterFactory
           managed: stopwords_en
-  #        ignoreCase: true
+  #        ignoreCase: 'true'
         -
           class: solr.WordDelimiterFilterFactory
           catenateNumbers: 0
diff --git a/config/optional/search_api_solr.solr_field_type.m_text_en_7_0_0.yml b/config/optional/search_api_solr.solr_field_type.m_text_en_7_0_0.yml
index 46d6348..19317e6 100644
--- a/config/optional/search_api_solr.solr_field_type.m_text_en_7_0_0.yml
+++ b/config/optional/search_api_solr.solr_field_type.m_text_en_7_0_0.yml
@@ -30,7 +30,7 @@ field_type:
         -
           class: solr.ManagedStopFilterFactory
           managed: stopwords_en
-  #        ignoreCase: true
+  #        ignoreCase: 'true'
         -
           class: solr.WordDelimiterGraphFilterFactory
           catenateNumbers: 1
@@ -65,12 +65,12 @@ field_type:
         -
           class: solr.ManagedSynonymFilterFactory
           managed: synonyms_en
-          expand: true
-  #        ignoreCase: true
+          expand: 'true'
+  #        ignoreCase: 'true'
         -
           class: solr.ManagedStopFilterFactory
           managed: stopwords_en
-  #        ignoreCase: true
+  #        ignoreCase: 'true'
         -
           class: solr.WordDelimiterGraphFilterFactory
           catenateNumbers: 0
diff --git a/config/optional/search_api_solr.solr_field_type.m_text_nl_5_2_0.yml b/config/optional/search_api_solr.solr_field_type.m_text_nl_5_2_0.yml
index 01d9467..8ecf776 100644
--- a/config/optional/search_api_solr.solr_field_type.m_text_nl_5_2_0.yml
+++ b/config/optional/search_api_solr.solr_field_type.m_text_nl_5_2_0.yml
@@ -49,11 +49,11 @@ field_type:
   #        minWordSize: 5
   #        minSubwordSize: 4
   #        maxSubwordSize: 15
-  #        onlyLongestMatch: false
+  #        onlyLongestMatch: 'false'
         -
           class: solr.ManagedStopFilterFactory
           managed: stopwords_nl
-  #        ignoreCase: true
+  #        ignoreCase: 'true'
         -
           class: solr.SnowballPorterFilterFactory
           language: Dutch
@@ -88,12 +88,12 @@ field_type:
         -
           class: solr.ManagedSynonymFilterFactory
           managed: synonyms_nl
-  #        expand: true
-  #        ignoreCase: true
+  #        expand: 'true'
+  #        ignoreCase: 'true'
         -
           class: solr.ManagedStopFilterFactory
           managed: stopwords_nl
-  #        ignoreCase: true
+  #        ignoreCase: 'true'
         -
           class: solr.SnowballPorterFilterFactory
           language: Dutch
diff --git a/config/optional/search_api_solr.solr_field_type.m_text_nl_7_0_0.yml b/config/optional/search_api_solr.solr_field_type.m_text_nl_7_0_0.yml
index 0f9df35..fe28ffe 100644
--- a/config/optional/search_api_solr.solr_field_type.m_text_nl_7_0_0.yml
+++ b/config/optional/search_api_solr.solr_field_type.m_text_nl_7_0_0.yml
@@ -49,11 +49,11 @@ field_type:
   #        minWordSize: 5
   #        minSubwordSize: 4
   #        maxSubwordSize: 15
-  #        onlyLongestMatch: false
+  #        onlyLongestMatch: 'false'
         -
           class: solr.ManagedStopFilterFactory
           managed: stopwords_nl
-  #        ignoreCase: true
+  #        ignoreCase: 'true'
         -
           class: solr.SnowballPorterFilterFactory
           language: Dutch
@@ -88,12 +88,12 @@ field_type:
         -
           class: solr.ManagedSynonymFilterFactory
           managed: synonyms_nl
-  #        expand: true
-  #        ignoreCase: true
+  #        expand: 'true'
+  #        ignoreCase: 'true'
         -
           class: solr.ManagedStopFilterFactory
           managed: stopwords_nl
-  #        ignoreCase: true
+  #        ignoreCase: 'true'
         -
           class: solr.SnowballPorterFilterFactory
           language: Dutch
diff --git a/config/optional/search_api_solr.solr_field_type.text_cs_5_0_0.yml b/config/optional/search_api_solr.solr_field_type.text_cs_5_0_0.yml
index 77e165f..ae7172f 100644
--- a/config/optional/search_api_solr.solr_field_type.text_cs_5_0_0.yml
+++ b/config/optional/search_api_solr.solr_field_type.text_cs_5_0_0.yml
@@ -49,7 +49,7 @@ field_type:
           class: solr.LowerCaseFilterFactory
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_cs.txt
         -
           class: solr.CzechStemFilterFactory
@@ -83,11 +83,11 @@ field_type:
         -
           class: solr.SynonymFilterFactory
           synonyms: synonyms_cs.txt
-          expand: true
-          ignoreCase: true
+          expand: 'true'
+          ignoreCase: 'true'
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_cs.txt
         -
           class: solr.CzechStemFilterFactory
diff --git a/config/optional/search_api_solr.solr_field_type.text_cs_7_0_0.yml b/config/optional/search_api_solr.solr_field_type.text_cs_7_0_0.yml
index f580f7b..79a66c2 100644
--- a/config/optional/search_api_solr.solr_field_type.text_cs_7_0_0.yml
+++ b/config/optional/search_api_solr.solr_field_type.text_cs_7_0_0.yml
@@ -49,7 +49,7 @@ field_type:
           class: solr.LowerCaseFilterFactory
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_cs.txt
         -
           class: solr.CzechStemFilterFactory
@@ -83,11 +83,11 @@ field_type:
         -
           class: solr.SynonymFilterFactory
           synonyms: synonyms_cs.txt
-          expand: true
-          ignoreCase: true
+          expand: 'true'
+          ignoreCase: 'true'
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_cs.txt
         -
           class: solr.CzechStemFilterFactory
diff --git a/config/optional/search_api_solr.solr_field_type.text_de_5_0_0.yml b/config/optional/search_api_solr.solr_field_type.text_de_5_0_0.yml
index 4a6092c..3d7813c 100644
--- a/config/optional/search_api_solr.solr_field_type.text_de_5_0_0.yml
+++ b/config/optional/search_api_solr.solr_field_type.text_de_5_0_0.yml
@@ -53,10 +53,10 @@ field_type:
           minWordSize: 5
           minSubwordSize: 4
           maxSubwordSize: 15
-          onlyLongestMatch: false
+          onlyLongestMatch: 'false'
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_de.txt
         # GermanNormalizationFilter is not needed if German2 Porter stemmer is
         # used.
@@ -96,11 +96,11 @@ field_type:
         -
           class: solr.SynonymFilterFactory
           synonyms: synonyms_de.txt
-          expand: true
-          ignoreCase: true
+          expand: 'true'
+          ignoreCase: 'true'
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_de.txt
         # GermanNormalizationFilter is not needed if German2 Porter stemmer is
         # used.
diff --git a/config/optional/search_api_solr.solr_field_type.text_de_7_0_0.yml b/config/optional/search_api_solr.solr_field_type.text_de_7_0_0.yml
index 5396351..5ba4bb3 100644
--- a/config/optional/search_api_solr.solr_field_type.text_de_7_0_0.yml
+++ b/config/optional/search_api_solr.solr_field_type.text_de_7_0_0.yml
@@ -53,10 +53,10 @@ field_type:
           minWordSize: 5
           minSubwordSize: 4
           maxSubwordSize: 15
-          onlyLongestMatch: false
+          onlyLongestMatch: 'false'
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_de.txt
         # GermanNormalizationFilter is not needed if German2 Porter stemmer is
         # used.
@@ -96,11 +96,11 @@ field_type:
         -
           class: solr.SynonymFilterFactory
           synonyms: synonyms_de.txt
-          expand: true
-          ignoreCase: true
+          expand: 'true'
+          ignoreCase: 'true'
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_de.txt
         # GermanNormalizationFilter is not needed if German2 Porter stemmer is
         # used.
diff --git a/config/optional/search_api_solr.solr_field_type.text_de_scientific_5_0_0.yml b/config/optional/search_api_solr.solr_field_type.text_de_scientific_5_0_0.yml
index 1a0cf52..5b154ee 100644
--- a/config/optional/search_api_solr.solr_field_type.text_de_scientific_5_0_0.yml
+++ b/config/optional/search_api_solr.solr_field_type.text_de_scientific_5_0_0.yml
@@ -40,10 +40,10 @@ field_type:
           minWordSize: 5
           minSubwordSize: 4
           maxSubwordSize: 15
-          onlyLongestMatch: false
+          onlyLongestMatch: 'false'
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_de.txt
         # GermanNormalizationFilter is not needed if German2 Porter stemmer is
         # used.
@@ -83,11 +83,11 @@ field_type:
         -
           class: solr.SynonymFilterFactory
           synonyms: synonyms_de.txt
-          expand: true
-          ignoreCase: true
+          expand: 'true'
+          ignoreCase: 'true'
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_de.txt
         # GermanNormalizationFilter is not needed if German2 Porter stemmer is
         # used.
diff --git a/config/optional/search_api_solr.solr_field_type.text_de_scientific_7_0_0.yml b/config/optional/search_api_solr.solr_field_type.text_de_scientific_7_0_0.yml
index aa0bf22..2ad3d57 100644
--- a/config/optional/search_api_solr.solr_field_type.text_de_scientific_7_0_0.yml
+++ b/config/optional/search_api_solr.solr_field_type.text_de_scientific_7_0_0.yml
@@ -40,10 +40,10 @@ field_type:
           minWordSize: 5
           minSubwordSize: 4
           maxSubwordSize: 15
-          onlyLongestMatch: false
+          onlyLongestMatch: 'false'
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_de.txt
         # GermanNormalizationFilter is not needed if German2 Porter stemmer is
         # used.
@@ -83,11 +83,11 @@ field_type:
         -
           class: solr.SynonymFilterFactory
           synonyms: synonyms_de.txt
-          expand: true
-          ignoreCase: true
+          expand: 'true'
+          ignoreCase: 'true'
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_de.txt
         # GermanNormalizationFilter is not needed if German2 Porter stemmer is
         # used.
diff --git a/config/optional/search_api_solr.solr_field_type.text_el_4_5_0.yml b/config/optional/search_api_solr.solr_field_type.text_el_4_5_0.yml
index c3b5db6..4a6f4de 100644
--- a/config/optional/search_api_solr.solr_field_type.text_el_4_5_0.yml
+++ b/config/optional/search_api_solr.solr_field_type.text_el_4_5_0.yml
@@ -40,7 +40,7 @@ field_type:
           class: solr.GreekLowerCaseFilterFactory
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_el.txt
         -
           class: solr.GreekStemFilterFactory
@@ -70,11 +70,11 @@ field_type:
         -
           class: solr.SynonymFilterFactory
           synonyms: synonyms_el.txt
-          expand: true
-          ignoreCase: true
+          expand: 'true'
+          ignoreCase: 'true'
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_el.txt
         -
           class: solr.GreekStemFilterFactory
diff --git a/config/optional/search_api_solr.solr_field_type.text_el_7_0_0.yml b/config/optional/search_api_solr.solr_field_type.text_el_7_0_0.yml
index e4774f4..b470737 100644
--- a/config/optional/search_api_solr.solr_field_type.text_el_7_0_0.yml
+++ b/config/optional/search_api_solr.solr_field_type.text_el_7_0_0.yml
@@ -41,7 +41,7 @@ field_type:
           class: solr.GreekLowerCaseFilterFactory
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_el.txt
         -
           class: solr.GreekStemFilterFactory
@@ -71,11 +71,11 @@ field_type:
         -
           class: solr.SynonymFilterFactory
           synonyms: synonyms_el.txt
-          expand: true
-          ignoreCase: true
+          expand: 'true'
+          ignoreCase: 'true'
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_el.txt
         -
           class: solr.GreekStemFilterFactory
diff --git a/config/optional/search_api_solr.solr_field_type.text_en_4_5_0.yml b/config/optional/search_api_solr.solr_field_type.text_en_4_5_0.yml
index fa3d87c..86d1668 100644
--- a/config/optional/search_api_solr.solr_field_type.text_en_4_5_0.yml
+++ b/config/optional/search_api_solr.solr_field_type.text_en_4_5_0.yml
@@ -29,7 +29,7 @@ field_type:
       filters:
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_en.txt
         -
           class: solr.WordDelimiterFilterFactory
@@ -65,11 +65,11 @@ field_type:
         -
           class: solr.SynonymFilterFactory
           synonyms: synonyms_en.txt
-          expand: true
-          ignoreCase: true
+          expand: 'true'
+          ignoreCase: 'true'
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_en.txt
         -
           class: solr.WordDelimiterFilterFactory
diff --git a/config/optional/search_api_solr.solr_field_type.text_en_7_0_0.yml b/config/optional/search_api_solr.solr_field_type.text_en_7_0_0.yml
index 2be38e5..c13f4fb 100644
--- a/config/optional/search_api_solr.solr_field_type.text_en_7_0_0.yml
+++ b/config/optional/search_api_solr.solr_field_type.text_en_7_0_0.yml
@@ -29,7 +29,7 @@ field_type:
       filters:
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_en.txt
         -
           class: solr.WordDelimiterGraphFilterFactory
@@ -65,11 +65,11 @@ field_type:
         -
           class: solr.SynonymFilterFactory
           synonyms: synonyms_en.txt
-          expand: true
-          ignoreCase: true
+          expand: 'true'
+          ignoreCase: 'true'
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_en.txt
         -
           class: solr.WordDelimiterGraphFilterFactory
diff --git a/config/optional/search_api_solr.solr_field_type.text_es_4_5_0.yml b/config/optional/search_api_solr.solr_field_type.text_es_4_5_0.yml
index 6c7c198..8bac79b 100644
--- a/config/optional/search_api_solr.solr_field_type.text_es_4_5_0.yml
+++ b/config/optional/search_api_solr.solr_field_type.text_es_4_5_0.yml
@@ -41,7 +41,7 @@ field_type:
           class: solr.LowerCaseFilterFactory
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_es.txt
         -
           class: solr.SnowballPorterFilterFactory
@@ -73,11 +73,11 @@ field_type:
         -
           class: solr.SynonymFilterFactory
           synonyms: synonyms_es.txt
-          expand: true
-          ignoreCase: true
+          expand: 'true'
+          ignoreCase: 'true'
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_es.txt
         -
           class: solr.SnowballPorterFilterFactory
diff --git a/config/optional/search_api_solr.solr_field_type.text_es_7_0_0.yml b/config/optional/search_api_solr.solr_field_type.text_es_7_0_0.yml
index 0484214..e9f4202 100644
--- a/config/optional/search_api_solr.solr_field_type.text_es_7_0_0.yml
+++ b/config/optional/search_api_solr.solr_field_type.text_es_7_0_0.yml
@@ -41,7 +41,7 @@ field_type:
           class: solr.LowerCaseFilterFactory
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_es.txt
         -
           class: solr.SnowballPorterFilterFactory
@@ -73,11 +73,11 @@ field_type:
         -
           class: solr.SynonymFilterFactory
           synonyms: synonyms_es.txt
-          expand: true
-          ignoreCase: true
+          expand: 'true'
+          ignoreCase: 'true'
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_es.txt
         -
           class: solr.SnowballPorterFilterFactory
diff --git a/config/optional/search_api_solr.solr_field_type.text_fi_4_5_0.yml b/config/optional/search_api_solr.solr_field_type.text_fi_4_5_0.yml
index a5a995f..060a63e 100644
--- a/config/optional/search_api_solr.solr_field_type.text_fi_4_5_0.yml
+++ b/config/optional/search_api_solr.solr_field_type.text_fi_4_5_0.yml
@@ -45,7 +45,7 @@ field_type:
           class: solr.LowerCaseFilterFactory
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_fi.txt
         -
           class: solr.SnowballPorterFilterFactory
@@ -61,7 +61,7 @@ field_type:
           minWordSize: 5
           minSubwordSize: 2
           maxSubwordSize: 20
-          onlyLongestMatch: false
+          onlyLongestMatch: 'false'
         -
           class: solr.RemoveDuplicatesTokenFilterFactory
     -
@@ -92,11 +92,11 @@ field_type:
         -
           class: solr.SynonymFilterFactory
           synonyms: synonyms_fi.txt
-          expand: true
-          ignoreCase: true
+          expand: 'true'
+          ignoreCase: 'true'
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_fi.txt
         -
           class: solr.SnowballPorterFilterFactory
diff --git a/config/optional/search_api_solr.solr_field_type.text_fi_7_0_0.yml b/config/optional/search_api_solr.solr_field_type.text_fi_7_0_0.yml
index 16b2fe4..51b5ce5 100644
--- a/config/optional/search_api_solr.solr_field_type.text_fi_7_0_0.yml
+++ b/config/optional/search_api_solr.solr_field_type.text_fi_7_0_0.yml
@@ -45,7 +45,7 @@ field_type:
           class: solr.LowerCaseFilterFactory
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_fi.txt
         -
           class: solr.SnowballPorterFilterFactory
@@ -61,7 +61,7 @@ field_type:
           minWordSize: 5
           minSubwordSize: 2
           maxSubwordSize: 20
-          onlyLongestMatch: false
+          onlyLongestMatch: 'false'
         -
           class: solr.RemoveDuplicatesTokenFilterFactory
     -
@@ -92,11 +92,11 @@ field_type:
         -
           class: solr.SynonymFilterFactory
           synonyms: synonyms_fi.txt
-          expand: true
-          ignoreCase: true
+          expand: 'true'
+          ignoreCase: 'true'
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_fi.txt
         -
           class: solr.SnowballPorterFilterFactory
diff --git a/config/optional/search_api_solr.solr_field_type.text_fr_4_5_0.yml b/config/optional/search_api_solr.solr_field_type.text_fr_4_5_0.yml
index 91fddb2..ff20901 100644
--- a/config/optional/search_api_solr.solr_field_type.text_fr_4_5_0.yml
+++ b/config/optional/search_api_solr.solr_field_type.text_fr_4_5_0.yml
@@ -43,7 +43,7 @@ field_type:
           class: solr.LowerCaseFilterFactory
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_fr.txt
         -
           class: solr.SnowballPorterFilterFactory
@@ -75,11 +75,11 @@ field_type:
         -
           class: solr.SynonymFilterFactory
           synonyms: synonyms_fr.txt
-          expand: true
-          ignoreCase: true
+          expand: 'true'
+          ignoreCase: 'true'
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_fr.txt
         -
           class: solr.SnowballPorterFilterFactory
diff --git a/config/optional/search_api_solr.solr_field_type.text_fr_7_0_0.yml b/config/optional/search_api_solr.solr_field_type.text_fr_7_0_0.yml
index ea14460..62d252e 100644
--- a/config/optional/search_api_solr.solr_field_type.text_fr_7_0_0.yml
+++ b/config/optional/search_api_solr.solr_field_type.text_fr_7_0_0.yml
@@ -43,7 +43,7 @@ field_type:
           class: solr.LowerCaseFilterFactory
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_fr.txt
         -
           class: solr.SnowballPorterFilterFactory
@@ -75,11 +75,11 @@ field_type:
         -
           class: solr.SynonymFilterFactory
           synonyms: synonyms_fr.txt
-          expand: true
-          ignoreCase: true
+          expand: 'true'
+          ignoreCase: 'true'
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_fr.txt
         -
           class: solr.SnowballPorterFilterFactory
diff --git a/config/optional/search_api_solr.solr_field_type.text_it_4_5_0.yml b/config/optional/search_api_solr.solr_field_type.text_it_4_5_0.yml
index c29b57c..f0443fd 100644
--- a/config/optional/search_api_solr.solr_field_type.text_it_4_5_0.yml
+++ b/config/optional/search_api_solr.solr_field_type.text_it_4_5_0.yml
@@ -41,7 +41,7 @@ field_type:
           class: solr.LowerCaseFilterFactory
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_it.txt
         -
           class: solr.SnowballPorterFilterFactory
@@ -73,11 +73,11 @@ field_type:
         -
           class: solr.SynonymFilterFactory
           synonyms: synonyms_it.txt
-          expand: true
-          ignoreCase: true
+          expand: 'true'
+          ignoreCase: 'true'
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_it.txt
         -
           class: solr.SnowballPorterFilterFactory
diff --git a/config/optional/search_api_solr.solr_field_type.text_it_7_0_0.yml b/config/optional/search_api_solr.solr_field_type.text_it_7_0_0.yml
index 5e66769..2b71a7d 100644
--- a/config/optional/search_api_solr.solr_field_type.text_it_7_0_0.yml
+++ b/config/optional/search_api_solr.solr_field_type.text_it_7_0_0.yml
@@ -41,7 +41,7 @@ field_type:
           class: solr.LowerCaseFilterFactory
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_it.txt
         -
           class: solr.SnowballPorterFilterFactory
@@ -73,11 +73,11 @@ field_type:
         -
           class: solr.SynonymFilterFactory
           synonyms: synonyms_it.txt
-          expand: true
-          ignoreCase: true
+          expand: 'true'
+          ignoreCase: 'true'
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_it.txt
         -
           class: solr.SnowballPorterFilterFactory
diff --git a/config/optional/search_api_solr.solr_field_type.text_nl_4_5_0.yml b/config/optional/search_api_solr.solr_field_type.text_nl_4_5_0.yml
index 2661dc1..5dae4d2 100644
--- a/config/optional/search_api_solr.solr_field_type.text_nl_4_5_0.yml
+++ b/config/optional/search_api_solr.solr_field_type.text_nl_4_5_0.yml
@@ -49,10 +49,10 @@ field_type:
           minWordSize: 5
           minSubwordSize: 4
           maxSubwordSize: 15
-          onlyLongestMatch: false
+          onlyLongestMatch: 'false'
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_nl.txt
         -
           class: solr.SnowballPorterFilterFactory
@@ -88,11 +88,11 @@ field_type:
         -
           class: solr.SynonymFilterFactory
           synonyms: synonyms_nl.txt
-          expand: true
-          ignoreCase: true
+          expand: 'true'
+          ignoreCase: 'true'
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_nl.txt
         -
           class: solr.SnowballPorterFilterFactory
diff --git a/config/optional/search_api_solr.solr_field_type.text_nl_7_0_0.yml b/config/optional/search_api_solr.solr_field_type.text_nl_7_0_0.yml
index 637376f..70e9984 100644
--- a/config/optional/search_api_solr.solr_field_type.text_nl_7_0_0.yml
+++ b/config/optional/search_api_solr.solr_field_type.text_nl_7_0_0.yml
@@ -49,10 +49,10 @@ field_type:
           minWordSize: 5
           minSubwordSize: 4
           maxSubwordSize: 15
-          onlyLongestMatch: false
+          onlyLongestMatch: 'false'
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_nl.txt
         -
           class: solr.SnowballPorterFilterFactory
@@ -88,11 +88,11 @@ field_type:
         -
           class: solr.SynonymFilterFactory
           synonyms: synonyms_nl.txt
-          expand: true
-          ignoreCase: true
+          expand: 'true'
+          ignoreCase: 'true'
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_nl.txt
         -
           class: solr.SnowballPorterFilterFactory
diff --git a/config/optional/search_api_solr.solr_field_type.text_phonetic_de_7_0_0.yml b/config/optional/search_api_solr.solr_field_type.text_phonetic_de_7_0_0.yml
index be253f6..cb04679 100644
--- a/config/optional/search_api_solr.solr_field_type.text_phonetic_de_7_0_0.yml
+++ b/config/optional/search_api_solr.solr_field_type.text_phonetic_de_7_0_0.yml
@@ -49,17 +49,17 @@ field_type:
           minWordSize: 5
           minSubwordSize: 4
           maxSubwordSize: 15
-          onlyLongestMatch: false
+          onlyLongestMatch: 'false'
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_phonetic_de.txt
         -
           class: solr.BeiderMorseFilterFactory
           languageSet: german
           nameType: GENERIC
           ruleType: APPROX
-          concat: true
+          concat: 'true'
         -
           class: solr.RemoveDuplicatesTokenFilterFactory
     -
@@ -85,14 +85,14 @@ field_type:
           class: solr.LowerCaseFilterFactory
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_phonetic_de.txt
         -
           class: solr.BeiderMorseFilterFactory
           languageSet: german
           nameType: GENERIC
           ruleType: APPROX
-          concat: true
+          concat: 'true'
         -
           class: solr.RemoveDuplicatesTokenFilterFactory
 solr_configs: {}
diff --git a/config/optional/search_api_solr.solr_field_type.text_phonetic_el_7_0_0.yml b/config/optional/search_api_solr.solr_field_type.text_phonetic_el_7_0_0.yml
index 87da711..60af90b 100644
--- a/config/optional/search_api_solr.solr_field_type.text_phonetic_el_7_0_0.yml
+++ b/config/optional/search_api_solr.solr_field_type.text_phonetic_el_7_0_0.yml
@@ -37,14 +37,14 @@ field_type:
           class: solr.GreekLowerCaseFilterFactory
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_phonetic_el.txt
         -
           class: solr.BeiderMorseFilterFactory
           languageSet: greek
           nameType: GENERIC
           ruleType: APPROX
-          concat: true
+          concat: 'true'
         -
           class: solr.RemoveDuplicatesTokenFilterFactory
     -
@@ -66,14 +66,14 @@ field_type:
           class: solr.GreekLowerCaseFilterFactory
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_phonetic_el.txt
         -
           class: solr.BeiderMorseFilterFactory
           languageSet: greek
           nameType: GENERIC
           ruleType: APPROX
-          concat: true
+          concat: 'true'
         -
           class: solr.RemoveDuplicatesTokenFilterFactory
 solr_configs: {}
diff --git a/config/optional/search_api_solr.solr_field_type.text_phonetic_en_7_0_0.yml b/config/optional/search_api_solr.solr_field_type.text_phonetic_en_7_0_0.yml
index ccbe04b..b1d3cf8 100644
--- a/config/optional/search_api_solr.solr_field_type.text_phonetic_en_7_0_0.yml
+++ b/config/optional/search_api_solr.solr_field_type.text_phonetic_en_7_0_0.yml
@@ -25,7 +25,7 @@ field_type:
       filters:
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_phonetic_en.txt
         -
           class: solr.WordDelimiterGraphFilterFactory
@@ -48,7 +48,7 @@ field_type:
           languageSet: english
           nameType: GENERIC
           ruleType: APPROX
-          concat: true
+          concat: 'true'
         -
           class: solr.RemoveDuplicatesTokenFilterFactory
     -
@@ -58,7 +58,7 @@ field_type:
       filters:
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_phonetic_en.txt
         -
           class: solr.WordDelimiterGraphFilterFactory
@@ -81,7 +81,7 @@ field_type:
           languageSet: english
           nameType: GENERIC
           ruleType: APPROX
-          concat: true
+          concat: 'true'
         -
           class: solr.RemoveDuplicatesTokenFilterFactory
 solr_configs: {}
diff --git a/config/optional/search_api_solr.solr_field_type.text_phonetic_es_7_0_0.yml b/config/optional/search_api_solr.solr_field_type.text_phonetic_es_7_0_0.yml
index e32a0f9..8126a5d 100644
--- a/config/optional/search_api_solr.solr_field_type.text_phonetic_es_7_0_0.yml
+++ b/config/optional/search_api_solr.solr_field_type.text_phonetic_es_7_0_0.yml
@@ -37,14 +37,14 @@ field_type:
           class: solr.LowerCaseFilterFactory
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_phonetic_es.txt
         -
           class: solr.BeiderMorseFilterFactory
           languageSet: spanish
           nameType: GENERIC
           ruleType: APPROX
-          concat: true
+          concat: 'true'
         -
           class: solr.RemoveDuplicatesTokenFilterFactory
     -
@@ -66,14 +66,14 @@ field_type:
           class: solr.LowerCaseFilterFactory
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_phonetic_es.txt
         -
           class: solr.BeiderMorseFilterFactory
           languageSet: spanish
           nameType: GENERIC
           ruleType: APPROX
-          concat: true
+          concat: 'true'
         -
           class: solr.RemoveDuplicatesTokenFilterFactory
 solr_configs: {}
diff --git a/config/optional/search_api_solr.solr_field_type.text_phonetic_fr_7_0_0.yml b/config/optional/search_api_solr.solr_field_type.text_phonetic_fr_7_0_0.yml
index 4104fba..1b69a91 100644
--- a/config/optional/search_api_solr.solr_field_type.text_phonetic_fr_7_0_0.yml
+++ b/config/optional/search_api_solr.solr_field_type.text_phonetic_fr_7_0_0.yml
@@ -39,14 +39,14 @@ field_type:
           class: solr.LowerCaseFilterFactory
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_phonetic_fr.txt
         -
           class: solr.BeiderMorseFilterFactory
           languageSet: french
           nameType: GENERIC
           ruleType: APPROX
-          concat: true
+          concat: 'true'
         -
           class: solr.RemoveDuplicatesTokenFilterFactory
     -
@@ -68,14 +68,14 @@ field_type:
           class: solr.LowerCaseFilterFactory
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_phonetic_fr.txt
         -
           class: solr.BeiderMorseFilterFactory
           languageSet: french
           nameType: GENERIC
           ruleType: APPROX
-          concat: true
+          concat: 'true'
         -
           class: solr.RemoveDuplicatesTokenFilterFactory
 solr_configs: {}
diff --git a/config/optional/search_api_solr.solr_field_type.text_phonetic_it_7_0_0.yml b/config/optional/search_api_solr.solr_field_type.text_phonetic_it_7_0_0.yml
index fd9a8d2..12bfef3 100644
--- a/config/optional/search_api_solr.solr_field_type.text_phonetic_it_7_0_0.yml
+++ b/config/optional/search_api_solr.solr_field_type.text_phonetic_it_7_0_0.yml
@@ -37,14 +37,14 @@ field_type:
           class: solr.LowerCaseFilterFactory
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_phonetic_it.txt
         -
           class: solr.BeiderMorseFilterFactory
           languageSet: italian
           nameType: GENERIC
           ruleType: APPROX
-          concat: true
+          concat: 'true'
         -
           class: solr.RemoveDuplicatesTokenFilterFactory
     -
@@ -66,14 +66,14 @@ field_type:
           class: solr.LowerCaseFilterFactory
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_phonetic_it.txt
         -
           class: solr.BeiderMorseFilterFactory
           languageSet: italian
           nameType: GENERIC
           ruleType: APPROX
-          concat: true
+          concat: 'true'
         -
           class: solr.RemoveDuplicatesTokenFilterFactory
 solr_configs: {}
diff --git a/config/optional/search_api_solr.solr_field_type.text_phonetic_pl_7_0_0.yml b/config/optional/search_api_solr.solr_field_type.text_phonetic_pl_7_0_0.yml
index 2418b1e..b155ba0 100644
--- a/config/optional/search_api_solr.solr_field_type.text_phonetic_pl_7_0_0.yml
+++ b/config/optional/search_api_solr.solr_field_type.text_phonetic_pl_7_0_0.yml
@@ -45,14 +45,14 @@ field_type:
           class: solr.LowerCaseFilterFactory
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_phonetic_pl.txt
         -
           class: solr.BeiderMorseFilterFactory
           languageSet: polish
           nameType: GENERIC
           ruleType: APPROX
-          concat: true
+          concat: 'true'
         -
           class: solr.RemoveDuplicatesTokenFilterFactory
     -
@@ -78,14 +78,14 @@ field_type:
           class: solr.LowerCaseFilterFactory
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_phonetic_pl.txt
         -
           class: solr.BeiderMorseFilterFactory
           languageSet: polish
           nameType: GENERIC
           ruleType: APPROX
-          concat: true
+          concat: 'true'
         -
           class: solr.RemoveDuplicatesTokenFilterFactory
 solr_configs: {}
diff --git a/config/optional/search_api_solr.solr_field_type.text_phonetic_ru_7_0_0.yml b/config/optional/search_api_solr.solr_field_type.text_phonetic_ru_7_0_0.yml
index 95a2d56..b96ed39 100644
--- a/config/optional/search_api_solr.solr_field_type.text_phonetic_ru_7_0_0.yml
+++ b/config/optional/search_api_solr.solr_field_type.text_phonetic_ru_7_0_0.yml
@@ -37,14 +37,14 @@ field_type:
           class: solr.LowerCaseFilterFactory
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_phonetic_ru.txt
         -
           class: solr.BeiderMorseFilterFactory
           languageSet: cyrillic
           nameType: GENERIC
           ruleType: APPROX
-          concat: true
+          concat: 'true'
         -
           class: solr.RemoveDuplicatesTokenFilterFactory
     -
@@ -66,14 +66,14 @@ field_type:
           class: solr.LowerCaseFilterFactory
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_phonetic_ru.txt
         -
           class: solr.BeiderMorseFilterFactory
           languageSet: cyrillic
           nameType: GENERIC
           ruleType: APPROX
-          concat: true
+          concat: 'true'
         -
           class: solr.RemoveDuplicatesTokenFilterFactory
 solr_configs: {}
diff --git a/config/optional/search_api_solr.solr_field_type.text_phonetic_uk_7_0_0.yml b/config/optional/search_api_solr.solr_field_type.text_phonetic_uk_7_0_0.yml
index 24e42f0..9c9e180 100644
--- a/config/optional/search_api_solr.solr_field_type.text_phonetic_uk_7_0_0.yml
+++ b/config/optional/search_api_solr.solr_field_type.text_phonetic_uk_7_0_0.yml
@@ -37,14 +37,14 @@ field_type:
           class: solr.LowerCaseFilterFactory
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_phonetic_uk.txt
         -
           class: solr.BeiderMorseFilterFactory
           languageSet: cyrillic
           nameType: GENERIC
           ruleType: APPROX
-          concat: true
+          concat: 'true'
         -
           class: solr.RemoveDuplicatesTokenFilterFactory
     -
@@ -66,14 +66,14 @@ field_type:
           class: solr.LowerCaseFilterFactory
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_phonetic_uk.txt
         -
           class: solr.BeiderMorseFilterFactory
           languageSet: cyrillic
           nameType: GENERIC
           ruleType: APPROX
-          concat: true
+          concat: 'true'
         -
           class: solr.RemoveDuplicatesTokenFilterFactory
 solr_configs: {}
diff --git a/config/optional/search_api_solr.solr_field_type.text_pl_7_0_0.yml b/config/optional/search_api_solr.solr_field_type.text_pl_7_0_0.yml
index e715ffe..8fa4137 100644
--- a/config/optional/search_api_solr.solr_field_type.text_pl_7_0_0.yml
+++ b/config/optional/search_api_solr.solr_field_type.text_pl_7_0_0.yml
@@ -49,7 +49,7 @@ field_type:
           class: solr.LowerCaseFilterFactory
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_pl.txt
         -
           class: solr.StempelPolishStemFilterFactory
@@ -83,11 +83,11 @@ field_type:
         -
           class: solr.SynonymFilterFactory
           synonyms: synonyms_pl.txt
-          expand: true
-          ignoreCase: true
+          expand: 'true'
+          ignoreCase: 'true'
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_pl.txt
         -
           class: solr.StempelPolishStemFilterFactory
diff --git a/config/optional/search_api_solr.solr_field_type.text_ru_4_5_0.yml b/config/optional/search_api_solr.solr_field_type.text_ru_4_5_0.yml
index 0198b88..0278817 100644
--- a/config/optional/search_api_solr.solr_field_type.text_ru_4_5_0.yml
+++ b/config/optional/search_api_solr.solr_field_type.text_ru_4_5_0.yml
@@ -37,7 +37,7 @@ field_type:
           class: solr.LowerCaseFilterFactory
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_ru.txt
         -
           class: solr.SnowballPorterFilterFactory
@@ -65,11 +65,11 @@ field_type:
         -
           class: solr.SynonymFilterFactory
           synonyms: synonyms_ru.txt
-          expand: true
-          ignoreCase: true
+          expand: 'true'
+          ignoreCase: 'true'
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_ru.txt
         -
           class: solr.SnowballPorterFilterFactory
diff --git a/config/optional/search_api_solr.solr_field_type.text_ru_7_0_0.yml b/config/optional/search_api_solr.solr_field_type.text_ru_7_0_0.yml
index 6e701e3..e1110b3 100644
--- a/config/optional/search_api_solr.solr_field_type.text_ru_7_0_0.yml
+++ b/config/optional/search_api_solr.solr_field_type.text_ru_7_0_0.yml
@@ -37,7 +37,7 @@ field_type:
           class: solr.LowerCaseFilterFactory
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_ru.txt
         -
           class: solr.SnowballPorterFilterFactory
@@ -65,11 +65,11 @@ field_type:
         -
           class: solr.SynonymFilterFactory
           synonyms: synonyms_ru.txt
-          expand: true
-          ignoreCase: true
+          expand: 'true'
+          ignoreCase: 'true'
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_ru.txt
         -
           class: solr.SnowballPorterFilterFactory
diff --git a/config/optional/search_api_solr.solr_field_type.text_uk_4_5_0.yml b/config/optional/search_api_solr.solr_field_type.text_uk_4_5_0.yml
index baed4ce..84e2c9d 100644
--- a/config/optional/search_api_solr.solr_field_type.text_uk_4_5_0.yml
+++ b/config/optional/search_api_solr.solr_field_type.text_uk_4_5_0.yml
@@ -37,7 +37,7 @@ field_type:
           class: solr.LowerCaseFilterFactory
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_uk.txt
         -
           class: solr.SnowballPorterFilterFactory
@@ -65,11 +65,11 @@ field_type:
         -
           class: solr.SynonymFilterFactory
           synonyms: synonyms_uk.txt
-          expand: true
-          ignoreCase: true
+          expand: 'true'
+          ignoreCase: 'true'
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_uk.txt
         -
           class: solr.SnowballPorterFilterFactory
diff --git a/config/optional/search_api_solr.solr_field_type.text_uk_7_0_0.yml b/config/optional/search_api_solr.solr_field_type.text_uk_7_0_0.yml
index 75ced32..9f9fcdf 100644
--- a/config/optional/search_api_solr.solr_field_type.text_uk_7_0_0.yml
+++ b/config/optional/search_api_solr.solr_field_type.text_uk_7_0_0.yml
@@ -37,7 +37,7 @@ field_type:
           class: solr.LowerCaseFilterFactory
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_uk.txt
         -
           class: solr.SnowballPorterFilterFactory
@@ -65,11 +65,11 @@ field_type:
         -
           class: solr.SynonymFilterFactory
           synonyms: synonyms_uk.txt
-          expand: true
-          ignoreCase: true
+          expand: 'true'
+          ignoreCase: 'true'
         -
           class: solr.StopFilterFactory
-          ignoreCase: true
+          ignoreCase: 'true'
           words: stopwords_uk.txt
         -
           class: solr.SnowballPorterFilterFactory
diff --git a/config/schema/solr_field_type.schema.yml b/config/schema/solr_field_type.schema.yml
index 341b7cb..f54726c 100644
--- a/config/schema/solr_field_type.schema.yml
+++ b/config/schema/solr_field_type.schema.yml
@@ -141,11 +141,11 @@ search_api_solr.solr_field_type.*:
                       label: 'DictionaryCompoundWordTokenFilter::maxSubwordSize'
                       nullable: true
                     onlyLongestMatch:
-                      type: boolean
+                      type: string
                       label: 'DictionaryCompoundWordTokenFilter::onlyLongestMatch'
                       nullable: true
                     ignoreCase:
-                      type: boolean
+                      type: string
                       label: 'StopFilter:: SynonymFilter::ignoreCase'
                       nullable: true
                     words:
@@ -161,7 +161,7 @@ search_api_solr.solr_field_type.*:
                       label: 'SynonymFilter::synonyms'
                       nullable: true
                     expand:
-                      type: boolean
+                      type: string
                       label: 'SynonymFilter:: ManagedSynonymFilter::expand'
                       nullable: true
                     managed:
@@ -193,7 +193,7 @@ search_api_solr.solr_field_type.*:
                       label: 'BeiderMorseFilter::ruleType'
                       nullable: true
                     concat:
-                      type: boolean
+                      type: string
                       label: 'BeiderMorseFilter::concat'
                       nullable: true
     solr_configs:
