diff --git a/static/scripts/websocket.js b/static/scripts/websocket.js
index 03020fe..51a2c44 100644
--- a/static/scripts/websocket.js
+++ b/static/scripts/websocket.js
@@ -29,6 +29,7 @@ window.addEventListener("load", function(evt) {
         }, 1000)
     }
     const wsOnMessageF = function (evt) {
+        let dat = JSON.parse(evt.data)
         if ('SOURCE_TCP' in dat) {
             setIndicatorsTcp(dat.SOURCE_TCP)
             if(dat.SOURCE_TCP.Orientation[0] !== 0 && dat.SOURCE_TCP.Orientation[1] !== 0 && dat.SOURCE_TCP.Orientation[2] !== 0){