diff --git a/traveltimepy/sdk.py b/traveltimepy/sdk.py
index 0947e6d..e6d8c9e 100644
--- a/traveltimepy/sdk.py
+++ b/traveltimepy/sdk.py
@@ -719,7 +719,7 @@ def _headers(self, accept_type: AcceptType) -> Dict[str, str]:
         return {
             "X-Application-Id": self._app_id,
             "X-Api-Key": self._api_key,
-            "User-Agent": f"Travel Time Python SDK {__version__}",
+            "User-Agent": self._user_agent,
             "Content-Type": "application/json",
             "Accept": accept_type.value,
         }