diff --git a/packages/atproto_client/request.py b/packages/atproto_client/request.py
index 4980d70..5a78039 100644
--- a/packages/atproto_client/request.py
+++ b/packages/atproto_client/request.py
@@ -27,12 +27,12 @@ class Response:
 
 
 def _convert_headers_to_dict(headers: httpx.Headers) -> t.Dict[str, str]:
-    """Converts custom case-insensitive multi-dict of HTTPX to pure dict with lowercased keys.
+    """Convert custom case-insensitive multi-dict of HTTPX to pure dict with lowercased keys.
 
     Note:
         Concatenate headers into a single comma separated value when a key occurs multiple times.
     """
-    return {key: value for key, value in headers.items()}
+    return dict(headers.items())
 
 
 def _parse_response(response: httpx.Response) -> Response: