diff --git a/composer.json b/composer.json
index dea1e4d..4525b7f 100644
--- a/composer.json
+++ b/composer.json
@@ -9,7 +9,7 @@
 		"email": "will@fullscreen.io"
 	}],
 	"require": {
-		"silverstripe/framework": "3.*",
-		"silverstripe/cms": "3.*"
+		"silverstripe/framework": "3.1.*",
+		"silverstripe/cms": "3.1.*"
 	}
-}
\ No newline at end of file
+}