diff --git a/package.json b/package.json
index 8d7a8696..0aa98f16 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
     "cookie-parser": "1.4.6",
     "eslint": "3.19.0",
     "eslint-plugin-markdown": "1.0.2",
-    "express": "4.18.2",
+    "express": "4.21.0",
     "mocha": "8.1.1",
     "nyc": "15.1.0",
     "supertest": "4.0.2"