diff --git a/src/third_party/duktape-1.5.2/debugger/package.json b/src/third_party/duktape-1.5.2/debugger/package.json
index 961657448..cf02eeb6e 100644
--- a/src/third_party/duktape-1.5.2/debugger/package.json
+++ b/src/third_party/duktape-1.5.2/debugger/package.json
@@ -9,7 +9,7 @@
   "dependencies": {
     "bluebird": "~2.6.4",
     "minimist": "~1.1.0",
-    "express": "~4.10.1",
+    "express": "~4.21.1",
     "body-parser": "~1.9.3",
     "socket.io": "~1.2.1",
     "utf8": "~2.0.0",