diff --git a/composer.json b/composer.json
index 47d34bd..7d77700 100644
--- a/composer.json
+++ b/composer.json
@@ -28,6 +28,9 @@
         "optimize-autoloader": true,
         "allow-plugins": {
             "getkirby/composer-installer": true
-        }
+        },
+        "platform": {
+            "php": "8.3"
+        },
     }
 }