diff --git a/composer.json b/composer.json
index fed4a61..62a3c68 100644
--- a/composer.json
+++ b/composer.json
@@ -14,7 +14,10 @@
     "prefer-stable": true,
     "config": {
         "preferred-install": "dist",
-        "autoloader-suffix": "Drupal8"
+        "autoloader-suffix": "Drupal8",
+        "platform": {
+            "php": "5.5.9"
+        }
     },
     "extra": {
         "_readme": [
diff --git a/composer.lock b/composer.lock
index 00e92f2..62a6897 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,8 +4,8 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "hash": "1167766f8eca494239cc8a1baa1ea6bb",
-    "content-hash": "0cfc95231ad5eb3f8d306e45c9cc92d9",
+    "hash": "88262e89d539929ce37e88c58bef544f",
+    "content-hash": "b63a1fcf88492889d294f0baf64c7c82",
     "packages": [
         {
             "name": "asm89/stack-cors",
@@ -4224,5 +4224,8 @@
     "platform": {
         "php": ">=5.5.9"
     },
-    "platform-dev": []
+    "platform-dev": [],
+    "platform-overrides": {
+        "php": "5.5.9"
+    }
 }