diff --git a/composer.json b/composer.json
index b21275d..e398e8b 100644
--- a/composer.json
+++ b/composer.json
@@ -12,7 +12,7 @@
     ],
     "require": {
         "php": ">=8.1",
-        "symfony/asset-mapper": "^6.3",
+        "symfony/asset-mapper": "^6.3, <6.4",
         "symfony/console": "^5.4|^6.3",
         "symfony/http-client": "^5.4|^6.3",
         "symfony/process": "^5.4|^6.3"