diff --git a/client/python/upbit/authentication.py b/client/python/upbit/authentication.py
index ad4801f..ddfdec1 100644
--- a/client/python/upbit/authentication.py
+++ b/client/python/upbit/authentication.py
@@ -31,11 +31,13 @@ def matches(self, url):
         return MAPPER not in url
 
     def apply(self, request):
-        request.headers['User-Agent'] = "ujhin's Upbit SDKs"
+        payload = self.generate_payload(request)
+
+        request.headers['User-Agent'     ] = "ujhin's Upbit SDKs"
         request.headers['Accept-Encoding'] = 'gzip, deflate'
-        request.headers['Accept'] = '*/*'
-        request.headers['Connection'] = 'keep-alive'
-        request.headers['Authorization'] = self.generate_payload(request)
+        request.headers['Accept'         ] = '*/*'
+        request.headers['Connection'     ] = 'keep-alive'
+        request.headers['Authorization'  ] = payload
         return request
 
     def generate_payload(self, request):
@@ -51,11 +53,11 @@ def generate_payload(self, request):
         if params:
             query = self.generate_query(params)
 
-            h = hashlib.sha512()
-            h.update(query.encode())
-            query_hash = h.hexdigest()
+            sha512 = hashlib.sha512()
+            sha512.update(query.encode())
+            query_hash = sha512.hexdigest()
 
-            payload['query_hash'] = query_hash
+            payload['query_hash'    ] = query_hash
             payload['query_hash_alg'] = 'SHA512'
 
         jwt_token = jwt.encode(payload, self.secret_key)
diff --git a/client/python/upbit/client.py b/client/python/upbit/client.py
index 38a9f98..ad9086e 100644
--- a/client/python/upbit/client.py
+++ b/client/python/upbit/client.py
@@ -31,13 +31,13 @@ def __init__(
             **kwargs
         ).SWGClient
 
-        self.APIKey = models.APIKey(self.__client)
-        self.Account = models.Account(self.__client)
-        self.Candle = models.Candle(self.__client)
-        self.Deposit = models.Deposit(self.__client)
-        self.Market = models.Market(self.__client)
-        self.Order = models.Order(self.__client)
-        self.Trade = models.Trade(self.__client)
+        self.APIKey   = models.APIKey(self.__client)
+        self.Account  = models.Account(self.__client)
+        self.Candle   = models.Candle(self.__client)
+        self.Deposit  = models.Deposit(self.__client)
+        self.Market   = models.Market(self.__client)
+        self.Order    = models.Order(self.__client)
+        self.Trade    = models.Trade(self.__client)
         self.Withdraw = models.Withdraw(self.__client)
 
     def __str__(self):
diff --git a/client/python/upbit/models.py b/client/python/upbit/models.py
index ab3857b..30c8343 100644
--- a/client/python/upbit/models.py
+++ b/client/python/upbit/models.py
@@ -139,7 +139,7 @@ def Candle_minutes(self, **kwargs) -> dict:
         :type to: str
 
         :param count: 캔들 개수 (최대 200개까지 요청 가능) (optional)
-        :type count: number
+        :type count: int
         """
 
         future = self.__client.Candle.Candle_minutes(**kwargs)
@@ -160,7 +160,7 @@ def Candle_days(self, **kwargs) -> dict:
         :type to: str
 
         :param count: 캔들 개수 (optional)
-        :type count: number
+        :type count: int
 
         :param convertingPriceUnit: 종가 환산 화폐 단위 (생략 가능, KRW로 명시할 시 원화 환산 가격을 반환.)
         `convertingPriceUnit` 파라미터의 경우, 원화 마켓이 아닌 다른 마켓(ex. BTC, ETH)의 일봉 요청 시
@@ -187,7 +187,7 @@ def Candle_weeks(self, **kwargs) -> dict:
         :type to: str
 
         :param count: 캔들 개수 (optional)
-        :type count: number
+        :type count: int
         """
 
         future = self.__client.Candle.Candle_weeks(**kwargs)
@@ -208,7 +208,7 @@ def Candle_month(self, **kwargs) -> dict:
         :type to: str
         
         :param count: 캔들 개수 (optional)
-        :type count: number
+        :type count: int
         """
 
         future = self.__client.Candle.Candle_month(**kwargs)
@@ -269,7 +269,7 @@ def Deposit_generate_coin_address(self, **kwargs) -> dict:
 
 
         :param currency: Currency 코드
-        :type currency: string
+        :type currency: str
         """
 
         future = self.__client.Deposit.Deposit_generate_coin_address(**kwargs)
@@ -282,13 +282,13 @@ def Deposit_info(self, **kwargs) -> dict:
         ## 개별 입금 조회
 
         :param uuid: 입금 UUID (optional)
-        :type uuid: string
+        :type uuid: str
 
         :param txid: 입금 TXID (optional)
-        :type txid: string
+        :type txid: str
 
         :param currency: Currency 코드 (optional)
-        :type currency: string
+        :type currency: str
         """
 
         future = self.__client.Deposit.Deposit_info(**kwargs)
@@ -319,10 +319,10 @@ def Deposit_info_all(self, **kwargs) -> dict:
         :type txids: list
 
         :param limit: 개수 제한 (default: 100, max: 100) (optional)
-        :type limit: number
+        :type limit: int
 
         :param page: 페이지 수, default: 1 (optional)
-        :type page: number
+        :type page: int
 
         :param order_by: 정렬 방식 (optional)
         - asc : 오름차순
@@ -431,10 +431,10 @@ def Order_info_all(self, **kwargs) -> dict:
         :type identifiers: array
 
         :param page: 페이지 수, default: 1 (optional)
-        :type page: number
+        :type page: int
 
         :param limit: 요청 개수, default: 100 (optional)
-        :type limit: number
+        :type limit: int
 
         :param order_by: 정렬 방식 (optional)
         - asc : 오름차순
@@ -505,10 +505,10 @@ def Order_cancel(self, **kwargs) -> dict:
         [NOTE] `uuid` 혹은 `identifier` 둘 중 하나의 값이 반드시 포함되어야 합니다.
         
         :param uuid: 취소할 주문의 UUID (optional)
-        :type uuid: string
+        :type uuid: str
 
         :param identifier: 조회용 사용자 지정 값 (optional)
-        :type identifier: string
+        :type identifier: str
         """
 
         future = self.__client.Order.Order_cancel(**kwargs)
@@ -553,7 +553,7 @@ def Trade_ticks(self, **kwargs) -> dict:
         :type to: str
 
         :param count: 체결 개수 (optional)
-        :type count: number
+        :type count: int
 
         :param cursor: 페이지네이션 커서 (sequentialId)
         `sequential_id` 필드는 체결의 유일성 판단을 위한 근거로 쓰일 수 있습니다.
@@ -562,7 +562,7 @@ def Trade_ticks(self, **kwargs) -> dict:
 
         :param daysAgo: 최근 체결 날짜 기준 7일 이내의 이전 데이터 조회 가능.
         비워서 요청 시 가장 최근 체결 날짜 반환. (범위: 1 ~ 7) (optional)
-        :type daysAgo: number
+        :type daysAgo: int
         """
 
         future = self.__client.Trade.Trade_ticks(**kwargs)
@@ -611,7 +611,7 @@ def Withdraw_coin(self, **kwargs) -> dict:
         :type address: str
 
         :param secondary_address: 2차 출금 주소 (필요한 코인에 한해서) (optional)
-        :type secondary_address: string
+        :type secondary_address: str
 
         :param transaction_type: 출금 유형 (optional)
         - default : 일반출금
@@ -648,7 +648,7 @@ def Withdraw_info_all(self, **kwargs) -> dict:
         ## 출금 리스트를 조회한다.
 
         :param currency: Currency 코드 (optional)
-        :type currency: string
+        :type currency: str
 
         :param state: 출금 상태 (optional)
         - submitting : 처리 중
@@ -659,7 +659,7 @@ def Withdraw_info_all(self, **kwargs) -> dict:
         - processing : 처리 중
         - done : 완료
         - canceled : 취소됨
-        :type state: string
+        :type state: str
 
         :param uuids: 출금 UUID의 목록 (optional)
         :type uuids: list
@@ -668,10 +668,10 @@ def Withdraw_info_all(self, **kwargs) -> dict:
         :type txids: list
 
         :param limit: 개수 제한 (default: 100, max: 100) (optional)
-        :type limit: number
+        :type limit: int
 
         :param page: 페이지 수, default: 1 (optional)
-        :type page: number
+        :type page: int
 
         :param order_by: 정렬 방식 (optional)
         - asc : 오름차순
diff --git a/client/python/upbit/pkginfo.py b/client/python/upbit/pkginfo.py
index 5d28df7..8e5c37b 100644
--- a/client/python/upbit/pkginfo.py
+++ b/client/python/upbit/pkginfo.py
@@ -29,7 +29,7 @@ def _get_versions(package_name):
 PACKAGE_NAME     = 'upbit-client'
 
 OPEN_API_VERSION = '1.1.7'
-CURRENT_VERSION  = OPEN_API_VERSION+'.5'
+CURRENT_VERSION  = OPEN_API_VERSION+'.6'
 
 RELEASED_VERSION = _get_versions(PACKAGE_NAME)
 LATEST_VERSION   = RELEASED_VERSION[0]
@@ -37,8 +37,8 @@ def _get_versions(package_name):
 
 if LATEST_VERSION != CURRENT_VERSION:
     logging.basicConfig(format="[%(levelname)s] %(message)s")
-    logging.warning(f"""
-        {PACKAGE_NAME} is currently a newer version: {LATEST_VERSION}\n
-        Please update to the latest version using the pip command: 
-        `pip install --upgrade {PACKAGE_NAME}`
-    """)
+    logging.warning(
+        f"{PACKAGE_NAME} is currently a newer version: {LATEST_VERSION}\n"
+        f"Please update to the latest version using the pip command:" 
+        f"`pip install --upgrade {PACKAGE_NAME}`"
+    )
diff --git a/client/python/upbit/websocket.py b/client/python/upbit/websocket.py
index 237b4f3..358bb55 100644
--- a/client/python/upbit/websocket.py
+++ b/client/python/upbit/websocket.py
@@ -8,6 +8,9 @@
 
 WEBSOCKET_URI = "wss://api.upbit.com/websocket/v1"
 
+FIELD_TYPES   = ['ticker', 'trade', 'orderbook']
+FIELD_FORMATS = ['SIMPLE', 'DEFAULT']
+
 
 class UpbitWebSocket:
     """
@@ -58,6 +61,14 @@ def connect(
         ping_interval: Union[int, float] = None,
         ping_timeout: Union[int, float] = None
     ):
+        """
+        :param ping_interval: ping 간격 제한
+        :type ping_interval: Union[int, float]
+
+        :param ping_timeout: ping 시간 초과 제한
+        :type ping_timeout: Union[int, float]
+        """
+
         self.Connection = websockets.connect(
             uri=self.URI,
             ping_interval=ping_interval,
@@ -107,7 +118,7 @@ def generate_type_field(
 
         field = {}
 
-        if type in ['ticker', 'trade', 'orderbook']:
+        if type in FIELD_TYPES:
             field["type"] = type
         else:
             raise ValueError("'type' is not available")
@@ -147,7 +158,7 @@ def generate_payload(
         payload.extend(type_fields)
 
         fmt = format.upper()
-        fmt = fmt if fmt in ['SIMPLE', 'DEFAULT'] else 'DEFAULT'
+        fmt = fmt if fmt in FIELD_FORMATS else 'DEFAULT'
         payload.append({"format": fmt})
 
         return json.dumps(payload)