diff --git a/src/websocket_server.cpp b/src/websocket_server.cpp
index ad71d5f..c8b7471 100644
--- a/src/websocket_server.cpp
+++ b/src/websocket_server.cpp
@@ -130,7 +130,7 @@ int WebSocketServer::wsCallback(struct lws *wsi,
                 json parsed = json::parse(msg);
                 if (parsed.contains("event") && parsed["event"] == "setUserId") {
                     if (parsed.contains("data") && parsed["data"].contains("userId")) {
-                        ud->userId = parsed["data"]["userId"];
+                        ud->userId = parsed["data"]["userId"].get<std::string>();
                         std::cout << "User-ID gesetzt: " << ud->userId << std::endl;
                         
                         // Verbindung in der Map speichern