diff --git a/composer.json b/composer.json
index 40d475c..c8e9b4c 100644
--- a/composer.json
+++ b/composer.json
@@ -6,9 +6,9 @@
     "license": "BSD-3-Clause",
     "require": {
         "silverstripe/recipe-plugin": "^1.2",
-        "silverstripe/assets": "1.5.x-dev",
-        "silverstripe/config": "1.0.x-dev",
-        "silverstripe/framework": "4.5.x-dev"
+        "silverstripe/assets": "1.5.0-rc1",
+        "silverstripe/config": "1.0.18-rc1",
+        "silverstripe/framework": "4.5.0-rc1"
     },
     "require-dev": {
         "phpunit/phpunit": "^5.7"