diff --git a/qcloud_cos/version.py b/qcloud_cos/version.py
index 5a9545f7..42a3b009 100644
--- a/qcloud_cos/version.py
+++ b/qcloud_cos/version.py
@@ -1,2 +1,2 @@
 
-__version__ = '5.1.8.4'
+__version__ = '5.1.8.5'
diff --git a/setup.py b/setup.py
index 5d130935..6e7fc148 100644
--- a/setup.py
+++ b/setup.py
@@ -16,7 +16,7 @@ def long_description():
 
 setup(
     name='cos-python-sdk-v5',
-    version='1.8.4',
+    version='1.8.5',
     url='https://www.qcloud.com/',
     license='MIT',
     author='tiedu, lewzylu, channingliu',