diff --git a/qcloud_cos/version.py b/qcloud_cos/version.py
index 965a29c..47b5ac9 100644
--- a/qcloud_cos/version.py
+++ b/qcloud_cos/version.py
@@ -1 +1 @@
-__version__ = '5.1.9.27'
+__version__ = '5.1.9.28'
diff --git a/setup.py b/setup.py
index fc2b54a..f7461f3 100644
--- a/setup.py
+++ b/setup.py
@@ -33,7 +33,7 @@ def long_description():
 
 setup(
     name='cos-python-sdk-v5',
-    version='1.9.27',
+    version='1.9.28',
     url='https://www.qcloud.com/',
     license='MIT',
     author='tiedu, lewzylu, channingliu',