diff --git a/docs/themes/docdock/static/revealjs/plugin/multiplex/package.json b/docs/themes/docdock/static/revealjs/plugin/multiplex/package.json
index c45863d7f..ecce33bc0 100644
--- a/docs/themes/docdock/static/revealjs/plugin/multiplex/package.json
+++ b/docs/themes/docdock/static/revealjs/plugin/multiplex/package.json
@@ -10,7 +10,7 @@
     "node": "~4.1.1"
   },
   "dependencies": {
-    "express": "~4.15.5",
+    "express": "~4.19.2",
     "grunt-cli": "~1.3.0",
     "mustache": "~2.2.1",
     "socket.io": "~1.7.4"