diff --git a/okx/client.py b/okx/client.py
index fc9acd3..d8dc956 100644
--- a/okx/client.py
+++ b/okx/client.py
@@ -49,6 +49,6 @@ class Client(object):
         request_path = c.API_URL + c.SERVER_TIMESTAMP_URL
         response = self.client.get(request_path)
         if response.status_code == 200:
-            return response.json()['ts']
+            return response.json()['data'][0]['ts']
         else:
-            return ""
\ No newline at end of file
+            return ""