diff --git a/composer.json b/composer.json
index 79b9b51..d79aba2 100644
--- a/composer.json
+++ b/composer.json
@@ -17,6 +17,9 @@
       "ipl\\I18n\\": "src"
     }
   },
+  "require-dev": {
+    "ipl/stdlib": "dev-main"
+  },
   "autoload-dev": {
     "psr-4": {
       "ipl\\Tests\\I18n\\": "tests"