diff --git a/package.json b/package.json
index 8b81125..3dc2f20 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "dependencies": {
-    "express": ">=4.18.1"
+    "express": ">=4.18.1 < 5.0.0"
   },
   "scripts": {
     "start": "./run.sh"