diff --git a/client/python/upbit/__init__.py b/client/python/upbit/__init__.py
index d5a57f2..ceb8843 100644
--- a/client/python/upbit/__init__.py
+++ b/client/python/upbit/__init__.py
@@ -8,7 +8,7 @@
 __module_name__ = 'upbit-client'
 
 __open_api_version__ = '1.1.7'
-__version__          = __open_api_version__+'.2'
+__version__          = __open_api_version__+'.3'
 __released_version__ = Version.get_versions(__module_name__)
 __latest_version__   = __released_version__[0]
 
diff --git a/client/python/upbit/websocket.py b/client/python/upbit/websocket.py
index cb8476c..1088ee2 100644
--- a/client/python/upbit/websocket.py
+++ b/client/python/upbit/websocket.py
@@ -10,7 +10,7 @@
 
 
 class UpbitWebSocket:
-    f"""
+    """
     Upbit WebSocket Client
     Please read the official Upbit Client document.
     Documents: https://ujhin.github.io/upbit-client-docs/