diff --git a/package.json b/package.json
index f16f0c3..2eab139 100644
--- a/package.json
+++ b/package.json
@@ -17,7 +17,8 @@
     "moment-timezone": "^0.5.34",
     "nextcloud-node-client": "^1.8.2",
     "point-of-view": "^5.0.0",
-    "uuid": "^8.3.2"
+    "uuid": "^8.3.2",
+    "socket.io": "~2.3.0"
   },
   "engines": {
     "node": "12.x"