diff --git a/src/Plugin/Field/FieldFormatter/SimpleGMapFormatter.php b/src/Plugin/Field/FieldFormatter/SimpleGMapFormatter.php
index 184e12d..365197f 100644
--- a/src/Plugin/Field/FieldFormatter/SimpleGMapFormatter.php
+++ b/src/Plugin/Field/FieldFormatter/SimpleGMapFormatter.php
@@ -14,6 +14,7 @@ use Drupal\Core\Form\FormStateInterface;
  *   label = @Translation("Google Map from one-line address"),
  *   field_types = {
  *     "string",
+ *     "string_long",
  *     "computed",
  *     "computed_string",
  *   }
diff --git a/src/Tests/SimpleGmapTest.php b/src/Tests/SimpleGmapTest.php
index 11e9170..c828650 100644
--- a/src/Tests/SimpleGmapTest.php
+++ b/src/Tests/SimpleGmapTest.php
@@ -103,7 +103,7 @@ class SimpleGmapTest extends WebTestBase {
 
     $this->drupalGet('admin/structure/types/manage/article/fields/add-field');
     $this->drupalPostForm(NULL, [
-      'new_storage_type' => 'string',
+      'new_storage_type' => 'string_long',
     ], 'Save and continue');
     $this->drupalPostForm(NULL, [
       'label' => $field3,