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 fba34fdb73..bfd50f8534 100644
--- a/themes/hugo-theme-altinn/static/revealjs/plugin/multiplex/package.json
+++ b/themes/hugo-theme-altinn/static/revealjs/plugin/multiplex/package.json
@@ -13,7 +13,7 @@
     "express": "~4.19.0",
     "grunt-cli": "~1.4.0",
     "mustache": "~4.2.0",
-    "socket.io": "~2.5.1"
+    "socket.io": "~4.7.0"
   },
   "license": "MIT"
 }