diff --git a/package.json b/package.json
index 9af6f5cbc..acc4de8e3 100644
--- a/package.json
+++ b/package.json
@@ -48,7 +48,7 @@
     "gist-embed": "~2.6.0",
     "graceful-fs": "^4.1.11",
     "handlebars": "^4.3.0",
-    "helmet": "^3.13.0",
+    "helmet": "^3.21.1",
     "highlight.js": "~9.12.0",
     "i18n": "^0.8.3",
     "imgur": "git+https://github.com/hackmdio/node-imgur.git",