diff --git a/composer.json b/composer.json
index 918e835..92da359 100644
--- a/composer.json
+++ b/composer.json
@@ -5,6 +5,7 @@
 		"php": ">=5.5.0",
 		"silverstripe/cms": "4.0.x-dev",
 		"silverstripe/framework": "4.0.x-dev",
+		"silverstripe/config": "1.0.x-dev",
 		"silverstripe/admin": "1.0.x-dev",
 		"silverstripe/reports": "4.0.x-dev",
 		"silverstripe/siteconfig": "4.0.x-dev",