diff --git a/params_service.py b/params_service.py
index 94a1184..dd0fe4f 100644
--- a/params_service.py
+++ b/params_service.py
@@ -189,8 +189,15 @@ class ParamsService(QObject):
             token = response.get("token")
             if token in self.pending_requests:
                 request = self.pending_requests.pop(token)
+                res_data = ''
                 if request.callback:
-                    res_data = response["data"]
+                    if response.get('cmd') == "get_params":
+
+                        res_data = response["data"]
+
+                    if response.get('cmd') == 'set_params':
+                        res_data = ''
+
                     res = Response(token, CMD.GET_PARAMS, request.widget, res_data)
                     request.callback(res)