diff --git a/spyder_notebook/server/app/package.json b/spyder_notebook/server/app/package.json
index 15076b4..abd84af 100644
--- a/spyder_notebook/server/app/package.json
+++ b/spyder_notebook/server/app/package.json
@@ -227,7 +227,9 @@
         "@jupyterlab/htmlviewer-extension": true,
         "@jupyterlab/imageviewer-extension": true,
         "@jupyterlab/lsp-extension": true,
-        "@jupyterlab/mainmenu-extension": true,
+        "@jupyterlab/mainmenu-extension": [
+          "@jupyterlab/mainmenu-extension:plugin"
+        ],
         "@jupyterlab/markedparser-extension": true,
         "@jupyterlab/mathjax-extension": true,
         "@jupyterlab/notebook-extension": [