diff --git a/themes/hugo-theme-altinn/static/revealjs/plugin/multiplex/package.json b/themes/hugo-theme-altinn/static/revealjs/plugin/multiplex/package.json
index bfd50f8534..4b2074f096 100644
--- a/themes/hugo-theme-altinn/static/revealjs/plugin/multiplex/package.json
+++ b/themes/hugo-theme-altinn/static/revealjs/plugin/multiplex/package.json
@@ -10,7 +10,7 @@
     "node": "~20.15.0"
   },
   "dependencies": {
-    "express": "~4.19.0",
+    "express": "~4.20.0",
     "grunt-cli": "~1.4.0",
     "mustache": "~4.2.0",
     "socket.io": "~4.7.0"