diff --git a/demo/composer.json b/demo/composer.json
index e18af6feae..6a66b36309 100644
--- a/demo/composer.json
+++ b/demo/composer.json
@@ -29,7 +29,7 @@
         "symfony/http-client": "^7.4",
         "symfony/mcp-bundle": "@dev",
         "symfony/mime": "^7.4",
-        "symfony/monolog-bundle": "^3.10",
+        "symfony/monolog-bundle": "^4.0",
         "symfony/runtime": "^7.4",
         "symfony/twig-bundle": "^7.4",
         "symfony/uid": "^7.4",