diff --git a/composer.json b/composer.json
index 724271632b..517f4b9f64 100644
--- a/composer.json
+++ b/composer.json
@@ -16,8 +16,8 @@
     ],
     "require": {
         "php": ">=5.6.0",
-        "atk4/data": "dev-develop",
-        "atk4/core": "dev-develop"
+        "atk4/data": "^1.1",
+        "atk4/core": "^1.2"
     },
     "require-dev": {
         "phpunit/phpunit": "<6",