diff --git a/litellm/llms/github_copilot/authenticator.py b/litellm/llms/github_copilot/authenticator.py
index 85c22516f95..7978ee02a67 100644
--- a/litellm/llms/github_copilot/authenticator.py
+++ b/litellm/llms/github_copilot/authenticator.py
@@ -194,7 +194,7 @@ class Authenticator:
         if not os.path.exists(self.token_dir):
             os.makedirs(self.token_dir, exist_ok=True)
 
-    def _get_github_headers(self, access_token: Optional[str] = None) -> Dict[str, str]:
+    def _get_github_headers(self, access_token: Optional[str] = None) -> dict:
         """
         Generate standard GitHub headers for API requests.