diff --git a/src/server/api/routers/notebook.ts b/src/server/api/routers/notebook.ts
index c0df1beb1..d7eb065cb 100644
--- a/src/server/api/routers/notebook.ts
+++ b/src/server/api/routers/notebook.ts
@@ -12,13 +12,20 @@ export const notebookRouter = createTRPCRouter({
   update: publicProcedure
     .input(z.object({ widgetId: z.string(), content: z.string(), configName: z.string() }))
     .mutation(async ({ input }) => {
+      if (!process.env.DISABLE_EDIT_MODE) {
+        throw new TRPCError({
+          code: 'METHOD_NOT_SUPPORTED',
+          message: 'Edit is not allowed, because edit mode is disabled'
+        });
+      }
+
       const config = getConfig(input.configName);
       const widget = config.widgets.find((widget) => widget.id === input.widgetId) as
         | INotebookWidget
         | undefined;
 
       if (!widget) {
-        return new TRPCError({
+        throw new TRPCError({
           code: 'BAD_REQUEST',
           message: 'Specified widget was not found',
         });