diff --git a/composer.json b/composer.json
index 7786a64..5cdf8f4 100644
--- a/composer.json
+++ b/composer.json
@@ -5,7 +5,7 @@
     "require": {
         "php": ">=7.1.0",
         "silverstripe/recipe-plugin": "^1.2",
-        "silverstripe/recipe-cms": "4.5.x-dev",
+        "silverstripe/recipe-cms": "4.5.0-alpha1",
         "silverstripe-themes/simple": "~3.2.0"
     },
     "require-dev": {