diff --git a/qcloud_cos/version.py b/qcloud_cos/version.py
index b0f12ca4..e6d2d486 100644
--- a/qcloud_cos/version.py
+++ b/qcloud_cos/version.py
@@ -1,2 +1,2 @@
 
-__version__ = '5.1.6.5'
+__version__ = '5.1.6.6'