diff --git a/README.md b/README.md
index 43ea289..fe7894e 100644
--- a/README.md
+++ b/README.md
@@ -312,6 +312,10 @@ You can set option *Force Web-Sockets* to force using only web-sockets transport
 -->
 
 ## Changelog
+
+### __WORK IN PROGRESS__
+* (Apollon77) fix socketio dependency
+
 ### 3.1.2 (2021-01-09)
 * (bluefox) Support of new Let's Encrypt (only with js-controller 3.2.x)
 
diff --git a/package.json b/package.json
index 89b88da..c93aade 100644
--- a/package.json
+++ b/package.json
@@ -16,6 +16,7 @@
     "url": "https://github.com/ioBroker/ioBroker.socketio"
   },
   "dependencies": {
+    "socket.io": "^2.3.0",
     "request": "^2.88.2",
     "cookie-parser": "^1.4.5",
     "express-session": "^1.17.1",