diff --git a/src/onepasswordconnectsdk/async_client.py b/src/onepasswordconnectsdk/async_client.py
index 4dd5467..7df6ad1 100644
--- a/src/onepasswordconnectsdk/async_client.py
+++ b/src/onepasswordconnectsdk/async_client.py
@@ -2,7 +2,7 @@
 import httpx
 from httpx import HTTPError
 import json
-from typing import Dict, List
+from typing import Dict, List, Union
 import os
 
 from onepasswordconnectsdk.serializer import Serializer
@@ -57,7 +57,7 @@ async def get_files(self, item_id: str, vault_id: str) -> List[File]:
             )
         return self.serializer.deserialize(response.content, "list[File]")
 
-    async def get_file_content(self, file_id: str, item_id: str, vault_id: str, content_path: str = None) -> bytes | str:
+    async def get_file_content(self, file_id: str, item_id: str, vault_id: str, content_path: str = None) -> Union[bytes, str]:
         url = content_path
         if content_path is None:
             url = PathBuilder().vaults(vault_id).items(item_id).files(file_id).content().build()
diff --git a/src/onepasswordconnectsdk/client.py b/src/onepasswordconnectsdk/client.py
index b0674a7..a62bae1 100644
--- a/src/onepasswordconnectsdk/client.py
+++ b/src/onepasswordconnectsdk/client.py
@@ -2,7 +2,7 @@
 import httpx
 from httpx import HTTPError
 import json
-from typing import Dict, List
+from typing import Dict, List, Union
 import os
 
 from onepasswordconnectsdk.async_client import AsyncClient
@@ -64,7 +64,7 @@ def get_files(self, item_id: str, vault_id: str) -> List[File]:
             )
         return self.serializer.deserialize(response.content, "list[File]")
 
-    def get_file_content(self, file_id: str, item_id: str, vault_id: str, content_path: str = None) -> bytes | str:
+    def get_file_content(self, file_id: str, item_id: str, vault_id: str, content_path: str = None) -> Union[bytes, str]:
         url = content_path
         if content_path is None:
             url = PathBuilder().vaults(vault_id).items(item_id).files(file_id).content().build()
@@ -381,7 +381,7 @@ def sanitize_for_serialization(self, obj):
         return self.serializer.sanitize_for_serialization(obj)
 
 
-def new_client(url: str, token: str, is_async: bool = False) -> AsyncClient | Client:
+def new_client(url: str, token: str, is_async: bool = False) -> Union[AsyncClient, Client]:
     """Builds a new client for interacting with 1Password Connect
     Parameters:
     url: The url of the 1Password Connect API
@@ -396,7 +396,7 @@ def new_client(url: str, token: str, is_async: bool = False) -> AsyncClient | Cl
     return Client(url, token)
 
 
-def new_client_from_environment(url: str = None) -> AsyncClient | Client:
+def new_client_from_environment(url: str = None) -> Union[AsyncClient, Client]:
     """Builds a new client for interacting with 1Password Connect
     using the OP_TOKEN environment variable