diff --git a/package.json b/package.json
index dfc489d..1617b4c 100644
--- a/package.json
+++ b/package.json
@@ -11,7 +11,7 @@
   "dependencies": {
     "body-parser": "^1.15.2",
     "ejs": "^2.5.1",
-    "express": "^4.14.0",
+    "express": "^4.21.2",
     "nexmo": "^1.0.0-beta-7",
     "socket.io": "^1.4.8"
   }