diff --git a/ibm_watson/websocket/synthesize_listener.py b/ibm_watson/websocket/synthesize_listener.py
index dee6e28a..33caf81d 100644
--- a/ibm_watson/websocket/synthesize_listener.py
+++ b/ibm_watson/websocket/synthesize_listener.py
@@ -120,7 +120,7 @@ def on_error(self, ws, error):
         """
         self.callback.on_error(error)
 
-    def on_close(self, ws, **kwargs):
+    def on_close(self, ws, *args, **kwargs):
         """
         Callback executed when websocket connection is closed
 
diff --git a/requirements.txt b/requirements.txt
index 7df31b85..fcf965b5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
 requests>=2.0,<3.0
 python_dateutil>=2.5.3
-websocket-client==1.1.0
+websocket-client==1.3.0
 ibm_cloud_sdk_core>=3.3.6, == 3.*