diff --git a/composer.json b/composer.json
index 34008bd..da98100 100644
--- a/composer.json
+++ b/composer.json
@@ -9,8 +9,10 @@
 			"email": "hamish@silverstripe.com"
 		}
 	],
-	"require":
-	{
+	"require": {
 		"silverstripe/framework": ">=3.1.x-dev,<4.0"
+	},
+	"require-dev": {
+		"hafriedlander/phockito": "*"
 	}
 }