diff --git a/supabase/_async/client.py b/supabase/_async/client.py
index b0048354..666571f1 100644
--- a/supabase/_async/client.py
+++ b/supabase/_async/client.py
@@ -34,7 +34,7 @@ def __init__(
         self,
         supabase_url: str,
         supabase_key: str,
-        options: Union[ClientOptions, None] = None,
+        options: Optional[ClientOptions] = None,
     ):
         """Instantiate the client.
 
@@ -97,7 +97,7 @@ async def create(
         cls,
         supabase_url: str,
         supabase_key: str,
-        options: Union[ClientOptions, None] = None,
+        options: Optional[ClientOptions] = None,
     ):
         auth_header = options.headers.get("Authorization") if options else None
         client = cls(supabase_url, supabase_key, options)
@@ -278,9 +278,7 @@ def _init_postgrest_client(
     def _create_auth_header(self, token: str):
         return f"Bearer {token}"
 
-    def _get_auth_headers(
-        self, authorization: Union[str, None] = None
-    ) -> Dict[str, str]:
+    def _get_auth_headers(self, authorization: Optional[str] = None) -> Dict[str, str]:
         if authorization is None:
             authorization = self.options.headers.get(
                 "Authorization", self._create_auth_header(self.supabase_key)
@@ -293,7 +291,7 @@ def _get_auth_headers(
         }
 
     def _listen_to_auth_events(
-        self, event: AuthChangeEvent, session: Union[Session, None]
+        self, event: AuthChangeEvent, session: Optional[Session]
     ):
         access_token = self.supabase_key
         if event in ["SIGNED_IN", "TOKEN_REFRESHED", "SIGNED_OUT"]:
@@ -310,7 +308,7 @@ def _listen_to_auth_events(
 async def create_client(
     supabase_url: str,
     supabase_key: str,
-    options: Union[ClientOptions, None] = None,
+    options: Optional[ClientOptions] = None,
 ) -> AsyncClient:
     """Create client function to instantiate supabase client like JS runtime.
 
diff --git a/supabase/_sync/client.py b/supabase/_sync/client.py
index 9eadb47b..f3ed2ba6 100644
--- a/supabase/_sync/client.py
+++ b/supabase/_sync/client.py
@@ -33,7 +33,7 @@ def __init__(
         self,
         supabase_url: str,
         supabase_key: str,
-        options: Union[ClientOptions, None] = None,
+        options: Optional[ClientOptions] = None,
     ):
         """Instantiate the client.
 
@@ -96,7 +96,7 @@ def create(
         cls,
         supabase_url: str,
         supabase_key: str,
-        options: Union[ClientOptions, None] = None,
+        options: Optional[ClientOptions] = None,
     ):
         auth_header = options.headers.get("Authorization") if options else None
         client = cls(supabase_url, supabase_key, options)
@@ -277,9 +277,7 @@ def _init_postgrest_client(
     def _create_auth_header(self, token: str):
         return f"Bearer {token}"
 
-    def _get_auth_headers(
-        self, authorization: Union[str, None] = None
-    ) -> Dict[str, str]:
+    def _get_auth_headers(self, authorization: Optional[str] = None) -> Dict[str, str]:
         if authorization is None:
             authorization = self.options.headers.get(
                 "Authorization", self._create_auth_header(self.supabase_key)
@@ -292,7 +290,7 @@ def _get_auth_headers(
         }
 
     def _listen_to_auth_events(
-        self, event: AuthChangeEvent, session: Union[Session, None]
+        self, event: AuthChangeEvent, session: Optional[Session]
     ):
         access_token = self.supabase_key
         if event in ["SIGNED_IN", "TOKEN_REFRESHED", "SIGNED_OUT"]:
@@ -308,7 +306,7 @@ def _listen_to_auth_events(
 def create_client(
     supabase_url: str,
     supabase_key: str,
-    options: Union[ClientOptions, None] = None,
+    options: Optional[ClientOptions] = None,
 ) -> SyncClient:
     """Create client function to instantiate supabase client like JS runtime.