diff --git a/composer.json b/composer.json
index 6791886e..46c34746 100644
--- a/composer.json
+++ b/composer.json
@@ -9,7 +9,7 @@
   },
   "require": {
     "php": ">=7.2",
-    "heidelpay/heidelpay-php": "^1.2",
+    "heidelpay/heidelpay-php": "1.2.5.1",
     "hwi/oauth-bundle": "^1.0.0",
     "php-http/guzzle6-adapter": "^2.0",
     "php-http/httplug-bundle": "^1",