diff --git a/composer.json b/composer.json
index c3a8385..4099d46 100644
--- a/composer.json
+++ b/composer.json
@@ -14,8 +14,8 @@
 	],
 	"require": {
 		"php": ">=5.3.2",
-		"silverstripe/framework": "~3.2",
-		"silverstripe/cms": "~3.2"
+		"silverstripe/framework": "~4.0",
+		"silverstripe/cms": "~4.0"
 	},
 	"require-dev": {
 		"silverstripe/postgresql": "*",