diff --git a/CHANGELOG.md b/CHANGELOG.md
index f66fc44..0f96548 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,7 @@ nylas-python Changelog
 Unreleased
 --------------
 * Add support for Scheduler APIs
+* Fixed attachment download response handling
 
 v6.4.0
 ----------------
diff --git a/nylas/handler/http_client.py b/nylas/handler/http_client.py
index 5b1d77a..a2a7be2 100644
--- a/nylas/handler/http_client.py
+++ b/nylas/handler/http_client.py
@@ -45,7 +45,6 @@ def _validate_response(response: Response) -> dict:
 
     return json
 
-
 def _build_query_params(base_url: str, query_params: dict = None) -> str:
     query_param_parts = []
     for key, value in query_params.items():
@@ -109,7 +108,7 @@ def _execute_download_request(
         query_params=None,
         stream=False,
         overrides=None,
-    ) -> Union[bytes, Response]:
+    ) -> Union[bytes, Response,dict]:
         request = self._build_request("GET", path, headers, query_params, overrides)
 
         timeout = self.timeout
@@ -124,6 +123,9 @@ def _execute_download_request(
                 stream=stream,
             )
 
+            if not response.ok:
+                return _validate_response(response)
+
             # If we stream an iterator for streaming the content, otherwise return the entire byte array
             if stream:
                 return response