diff --git a/composer.json b/composer.json
index c79ca24..9daa1ef 100644
--- a/composer.json
+++ b/composer.json
@@ -18,6 +18,7 @@
         "serve": "php -S localhost:8080 -t public/"
     },
     "require": {
+	"php": "8.5.4",
         "slim/slim": "4.*",
         "slim/psr7": "^1.8",
         "php-di/slim-bridge": "^3.4"