diff --git a/composer.json b/composer.json
index b50ba2dd..190d2996 100644
--- a/composer.json
+++ b/composer.json
@@ -33,5 +33,10 @@
     "require-dev": {
         "phpunit/phpunit": "~4.5",
         "squizlabs/php_codesniffer": "^3.3"
+    },
+    "config": {
+        "platform": {
+            "php": "5.4"
+        }
     }
 }