diff --git a/src/frontend/apps/impress/package.json b/src/frontend/apps/impress/package.json
index 658588e53..369a96291 100644
--- a/src/frontend/apps/impress/package.json
+++ b/src/frontend/apps/impress/package.json
@@ -56,6 +56,7 @@
     "@types/node": "*",
     "@types/react": "18.3.12",
     "@types/react-dom": "*",
+    "@types/ws": "8.5.13",
     "cross-env": "7.0.3",
     "dotenv": "16.4.7",
     "eslint-config-impress": "*",
diff --git a/src/frontend/apps/impress/src/features/docs/doc-management/libs/CollaborationProvider.ts b/src/frontend/apps/impress/src/features/docs/doc-management/libs/CollaborationProvider.ts
index 7d8c6cc17..36baf5798 100644
--- a/src/frontend/apps/impress/src/features/docs/doc-management/libs/CollaborationProvider.ts
+++ b/src/frontend/apps/impress/src/features/docs/doc-management/libs/CollaborationProvider.ts
@@ -46,6 +46,7 @@ export class CollaborationProvider extends HocuspocusProvider {
 
   public constructor(configuration: CollaborationProviderConfiguration) {
     const withWS = isFirefox();
+    //const withWS = true;
 
     let url = '';
     if (isHocuspocusProviderConfigurationUrl(configuration)) {
diff --git a/src/frontend/servers/y-provider/src/libs/PollSync.ts b/src/frontend/servers/y-provider/src/libs/PollSync.ts
index 4dbba2a6a..592f2b182 100644
--- a/src/frontend/servers/y-provider/src/libs/PollSync.ts
+++ b/src/frontend/servers/y-provider/src/libs/PollSync.ts
@@ -11,7 +11,7 @@ import {
 } from '@hocuspocus/server';
 import { Request, Response } from 'express';
 import { v4 as uuid } from 'uuid';
-import { readSyncMessage, readUpdate } from 'y-protocols/sync.js';
+import { readSyncMessage } from 'y-protocols/sync';
 import * as Y from 'yjs';
 
 import { base64ToYDoc, logger, toBase64 } from '@/utils';