diff --git a/composer.json b/composer.json
index 65a9f8f..ba9c828 100644
--- a/composer.json
+++ b/composer.json
@@ -17,6 +17,6 @@
         }
     },
     "require": {
-        "meta-tech/silex-core" : "~1.0"
+        "meta-tech/silex-core" : "^1.0"
     }
 }