diff --git a/composer.json b/composer.json
index 59c2ebe2430..018f196194c 100644
--- a/composer.json
+++ b/composer.json
@@ -90,7 +90,7 @@
         "phpunit/phpunit": "3.7.*",
         "twig/twig": "*",
         "smarty/smarty": "~3.0",
-        "imagine/imagine": "~0.5",
+        "imagine/imagine": "0.5.*",
         "swiftmailer/swiftmailer": "*",
         "fzaninotto/faker": "*",
         "cebe/indent": "*"