diff --git a/ldclient/impl/datasource/streaming.py b/ldclient/impl/datasource/streaming.py
index 0a44746..d4f89b5 100644
--- a/ldclient/impl/datasource/streaming.py
+++ b/ldclient/impl/datasource/streaming.py
@@ -114,6 +114,8 @@ def stop(self):
     def __stop_with_error_info(self, error: Optional[DataSourceErrorInfo]):
         log.info("Stopping StreamingUpdateProcessor")
         self._running = False
+        if self._sse:
+            self._sse.close()
 
         if self._data_source_update_sink is None:
             return