diff --git a/composer.json b/composer.json
index 005dd33..9d0bb0a 100644
--- a/composer.json
+++ b/composer.json
@@ -34,8 +34,9 @@
     }
   },
   "require": {
+    "php": "7.1 - 7.4", "ext-ionCube-Loader": "*",
     "oxid-esales/oxideshop-metapackage-ce": "~6.0 || ~6.1",
-    "d3/modcfg": "^5.1.0.0"
+    "d3/modcfg": ">=5.1.0.0"
   },
   "autoload": {
     "psr-4": {