diff --git a/composer.json b/composer.json
index 5f68dbc..9b346c6 100644
--- a/composer.json
+++ b/composer.json
@@ -24,8 +24,11 @@
         "source": "https://github.com/kozi/contao-recipientselect"
     },
     "require": {
-        "php": ">=5.4",
-        "contao/core": "~3.4"
+        "contao-community-alliance/composer-plugin": "~2"
+    },
+    "require-dev": {
+        "php": ">=5.5",
+        "contao/core": ">=3.4"
     },
     "minimum-stability": "dev",
     "prefer-stable": true,