diff --git a/package.json b/package.json
index de9761a8..1cc6374f 100644
--- a/package.json
+++ b/package.json
@@ -36,7 +36,7 @@
     "chokidar": "1.6.1",
     "clean-css": "3.4.19",
     "cross-spawn": "4.0.0",
-    "express": "4.14.0",
+    "express": "4.21.0",
     "fs-extra": "0.30.0",
     "glob": "^7.1.1",
     "json-loader": "0.5.4",