diff --git a/material/mi-pps-praesentation/plugin/multiplex/package-lock.json b/material/mi-pps-praesentation/plugin/multiplex/package-lock.json
index 763b002..c221500 100644
--- a/material/mi-pps-praesentation/plugin/multiplex/package-lock.json
+++ b/material/mi-pps-praesentation/plugin/multiplex/package-lock.json
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+        "call-bind": "^1.0.7",
+        "es-errors": "^1.3.0",
+        "get-intrinsic": "^1.2.4",
+        "object-inspect": "^1.13.1"
+      },
+      "engines": {
+        "node": ">= 0.4"
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+      "funding": {
+        "url": "https://github.com/sponsors/ljharb"
       }
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+      "engines": {
+        "node": ">= 0.8"
+      }
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     },
+    "node_modules/toidentifier": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/toidentifier/-/toidentifier-1.0.1.tgz",
+      "integrity": "sha512-o5sSPKEkg/DIQNmH43V0/uerLrpzVedkUh8tGNvaeXpfpuwjKenlSox/2O/BTlZUtEe+JG7s5YhEz608PlAHRA==",
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@@ -910,17 +1219,17 @@
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+      "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
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diff --git a/material/mi-pps-praesentation/plugin/multiplex/package.json b/material/mi-pps-praesentation/plugin/multiplex/package.json
old mode 100755
new mode 100644
index bbed77a..8f50767
--- a/material/mi-pps-praesentation/plugin/multiplex/package.json
+++ b/material/mi-pps-praesentation/plugin/multiplex/package.json
@@ -10,7 +10,7 @@
     "node": "~4.1.1"
   },
   "dependencies": {
-    "express": "~4.13.3",
+    "express": "~4.21.1",
     "grunt-cli": "~0.1.13",
     "mustache": "~2.2.1",
     "socket.io": "~1.3.7"