diff --git a/composer.json b/composer.json
index 826eb91b2..fe6880aa7 100644
--- a/composer.json
+++ b/composer.json
@@ -66,7 +66,7 @@
         "paragonie/random_compat": "~1.0",
         "craue/config-bundle": "~1.4",
         "mnapoli/piwik-twig-extension": "^1.0",
-        "lexik/maintenance-bundle": "dev-master"
+        "lexik/maintenance-bundle": "~2.1"
     },
     "require-dev": {
         "doctrine/doctrine-fixtures-bundle": "~2.2",