diff --git a/composer.json b/composer.json
index fa55dde35f446ab8160bb4282a47111376a10a15..fe078155d595ff4e098365a5f19d94dc636b1b18 100644
--- a/composer.json
+++ b/composer.json
@@ -46,7 +46,8 @@
 	},
 	"require-dev": {
 		"mikey179/vfsStream": "1.4.*@dev",
-		"phpunit/phpunit": "~4.7.0"
+		"phpunit/phpunit": "~4.7.0",
+		"codeception/codeception": "2.1.0"
 	},
 	"suggest": {
 		"ext-gd": "GDlib/Freetype is required for building images with text (GIFBUILDER) and can also be used to scale images",