diff --git a/composer.json b/composer.json
index 32f805e..53854a3 100644
--- a/composer.json
+++ b/composer.json
@@ -32,7 +32,7 @@
     }
   },
   "require": {
-    "php": "5.6-7.0",
+    "php": "5.6 - 7.0",
     "ext-ionCube-Loader": "*",
     "d3/heidelpay": "~6.0.1"
   },