diff --git a/composer.json b/composer.json
index b224c78..58eb41b 100644
--- a/composer.json
+++ b/composer.json
@@ -15,6 +15,7 @@
     ],
     "minimum-stability": "stable",
     "require": {
+        "potter/container": ">=0.0.1",
         "potter/controller": ">=0.0.1"
     }
 }