diff --git a/composer.json b/composer.json
index 2f883dc..e3efc1a 100644
--- a/composer.json
+++ b/composer.json
@@ -24,7 +24,7 @@
         }
     ],
     "require": {
-        "payum/core": "1.0.*",
+        "payum/core": "~1.0",
         "paypal/rest-api-sdk-php" : "~1.0"
     },
     "require-dev": {