diff --git a/composer.json b/composer.json
index 0187a6f..f21fa01 100644
--- a/composer.json
+++ b/composer.json
@@ -35,7 +35,7 @@
     "php": "^8.2 || ^8.3",
     "psr/http-message": "^1.0 || ^2.0",
     "psr/http-server-handler": "^1.0",
-    "smarty/smarty": ">=3.1.48 <5.0.0",
+    "smarty/smarty": ">=3.1.48 <6.0.0",
     "symfony/debug": "<5.0.0",
     "symfony/console": ">=4.0.0",
     "roave/security-advisories": "dev-latest"