diff --git a/composer.json b/composer.json
index ea6911f..8eec0cb 100644
--- a/composer.json
+++ b/composer.json
@@ -3,7 +3,8 @@
     "description": "Potter Framework Container Interface",
     "type": "library",
     "require": {
-        "php": "^8.5"
+        "php": "^8.5",
+        "psr/container": "^2.0"
     },
     "license": "MIT",
     "autoload": {