diff --git a/supabase_functions/_async/functions_client.py b/supabase_functions/_async/functions_client.py
index 8e84acd..0e24bca 100644
--- a/supabase_functions/_async/functions_client.py
+++ b/supabase_functions/_async/functions_client.py
@@ -7,7 +7,7 @@
 
 
 class AsyncFunctionsClient:
-    def __init__(self, url: str, headers: Dict, verify: bool = True):
+    def __init__(self, url: str, headers: Dict, timeout: int, verify: bool = True):
         self.url = url
         self.headers = {
             "User-Agent": f"supabase-py/functions-py v{__version__}",
@@ -17,6 +17,7 @@ def __init__(self, url: str, headers: Dict, verify: bool = True):
             base_url=self.url,
             headers=self.headers,
             verify=bool(verify),
+            timeout=timeout,
             follow_redirects=True,
             http2=True,
         )
diff --git a/supabase_functions/_sync/functions_client.py b/supabase_functions/_sync/functions_client.py
index d09d66c..c125ea5 100644
--- a/supabase_functions/_sync/functions_client.py
+++ b/supabase_functions/_sync/functions_client.py
@@ -7,7 +7,7 @@
 
 
 class SyncFunctionsClient:
-    def __init__(self, url: str, headers: Dict, verify: bool = True):
+    def __init__(self, url: str, headers: Dict, timeout: int, verify: bool = True):
         self.url = url
         self.headers = {
             "User-Agent": f"supabase-py/functions-py v{__version__}",
@@ -17,6 +17,7 @@ def __init__(self, url: str, headers: Dict, verify: bool = True):
             base_url=self.url,
             headers=self.headers,
             verify=bool(verify),
+            timeout=timeout,
             follow_redirects=True,
             http2=True,
         )
diff --git a/supabase_functions/utils.py b/supabase_functions/utils.py
index fbdd194..15af53d 100644
--- a/supabase_functions/utils.py
+++ b/supabase_functions/utils.py
@@ -3,6 +3,8 @@
 
 __version__ = "0.4.6"
 
+DEFAULT_FUNCTION_CLIENT_TIMEOUT = 5
+
 
 class SyncClient(BaseClient):
     def aclose(self) -> None:
diff --git a/tests/_async/clients.py b/tests/_async/clients.py
index 23a7d9f..38526a6 100644
--- a/tests/_async/clients.py
+++ b/tests/_async/clients.py
@@ -23,4 +23,5 @@ def function_client():
             "apiKey": mock_access_token(),
             "Authorization": f"Bearer {mock_access_token()}",
         },
+        timeout=10,
     )
diff --git a/tests/_sync/clients.py b/tests/_sync/clients.py
index 8b4b3f8..14da8b5 100644
--- a/tests/_sync/clients.py
+++ b/tests/_sync/clients.py
@@ -23,4 +23,5 @@ def function_client():
             "apiKey": mock_access_token(),
             "Authorization": f"Bearer {mock_access_token()}",
         },
+        timeout=10,
     )