diff --git a/composer.json b/composer.json
index 00927cf..70a1eda 100644
--- a/composer.json
+++ b/composer.json
@@ -17,10 +17,10 @@
         }
     },
     "require": {
-        "meta-tech/pws-auth" : "~2.1",
-        "meta-tech/silex-controller-service" : "~1.0",
-        "silex/silex": "~2.0",
+        "meta-tech/pws-auth" : "^2.1",
+        "meta-tech/silex-controller-service" : "^1.0",
+        "silex/silex": "^2.0",
         "gecko-packages/gecko-silex-config-service": "^2.0",
-        "symfony/security": "~3.2"
+        "symfony/security": "^3.2"
     }
 }