diff --git a/packages/clock/composer.json b/packages/clock/composer.json
index 9b47853..dcaba61 100644
--- a/packages/clock/composer.json
+++ b/packages/clock/composer.json
@@ -6,7 +6,7 @@
         "php": "^8.1",
         "psr/clock": "^1.0",
         "webmozart/assert": "^1.11",
-        "a50/container": "dev-main"
+        "a50/container": "^1.0"
     },
     "license": "MIT",
     "authors": [