diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 68a1dce..1a8569d 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -4,3 +4,6 @@ sphinx:
   configuration: docs/conf.py
   fail_on_warning: false
   builder: html
+  
+python:
+  version: 3.8
\ No newline at end of file
diff --git a/docs/conf.py b/docs/conf.py
index 876d1a5..c74d5dc 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -59,4 +59,6 @@ html_favicon = './assets/Github-Python.png'
 # Add any paths that contain custom static files (such as style sheets) here,
 # relative to this directory. They are copied after the builtin static files,
 # so a file named "default.css" will overwrite the builtin "default.css".
-html_static_path = ['_static']
\ No newline at end of file
+html_static_path = ['_static']
+
+autodoc_mock_imports = ["typing_extensions"]
\ No newline at end of file
diff --git a/github/client.py b/github/client.py
index d5ca29d..8fb6c80 100644
--- a/github/client.py
+++ b/github/client.py
@@ -190,14 +190,16 @@ class GHClient:
             @functools.wraps(func)
             async def wrapped(self: Self, *args: P.args, **kwargs: P.kwargs) -> Optional[Union[T, User, Repository]]:
                 if type == 'user':
-                    if obj := self._user_cache.get(kwargs.get('user')):
+                    obj = self._user_cache.get(kwargs.get('user'))
+                    if obj:
                         return obj
 
                     user: User = await func(self, *args, **kwargs)  # type: ignore
                     self._user_cache[kwargs.get("user")] = user
                     return user
                 if type == 'repo':
-                    if obj := self._repo_cache.get(kwargs.get('repo')):
+                    obj = self._repo_cache.get(kwargs.get('repo'))
+                    if obj:
                         return obj
 
                     repo: Repository = await func(self, *args, **kwargs)  # type: ignore