diff --git a/requirements-dev.txt b/requirements-dev.txt
index 683aeb57..7aec90ac 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -54,7 +54,7 @@ msal==1.32.3
 
 msal-extensions==1.3.1
 
-mypy==1.15.0
+mypy==1.16.0
 
 mypy-extensions==1.1.0 ; python_version >= '3.5'
 
diff --git a/src/msgraph_core/tasks/large_file_upload.py b/src/msgraph_core/tasks/large_file_upload.py
index 250321a2..882b2ad6 100644
--- a/src/msgraph_core/tasks/large_file_upload.py
+++ b/src/msgraph_core/tasks/large_file_upload.py
@@ -40,7 +40,7 @@ def __init__(
         cleaned_value = self.check_value_exists(
             upload_session, 'get_next_expected_range', ['next_expected_range', 'NextExpectedRange']
         )
-        self.next_range = cleaned_value[0]
+        self.next_range = cleaned_value[1] if cleaned_value[0] else None
         self._chunks = int((self.file_size / max_chunk_size) + 0.5)
         self.on_chunk_upload_complete: Optional[Callable[[list[int]], None]] = None