diff --git a/tes/apiendpoints.py b/tes/apiendpoints.py
index affa0c4e04cc0624f5680e2b36dea7eb3057bdb2..19afae1e8faa3fdf6303cb7a61c75f42f6e3033a 100644
--- a/tes/apiendpoints.py
+++ b/tes/apiendpoints.py
@@ -651,7 +651,7 @@ class CreateTunnel(Resource):
                        localbind=localbind, authtok=authtok)
             response = make_response(json.dumps({'localport':port}),200)
             response.mimetype = 'application/json'
-            response.set_cookie('twsproxyauth', authtok, secure=True)
+            response.set_cookie('twsproxyauth', authtok, secure=True, samesite='None')
             return response
         except AppParamsException as e:
             import traceback