diff --git a/src/javascript/2d/package.json b/src/javascript/2d/package.json
index 1c4c70834..479b80a5b 100644
--- a/src/javascript/2d/package.json
+++ b/src/javascript/2d/package.json
@@ -23,7 +23,7 @@
     "url": "~0.11.0"
   },
   "devDependencies": {
-    "express": "^4.13.3",
+    "express": "^5.1.0",
     "body-parser": "^1.14.1",
     "browserify": "~12.0.0",
     "leaflet": "~0.7.2",