diff --git a/requirements.txt b/requirements.txt
index f16d54e..a858ce1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,4 +5,4 @@ pytz>=2017.2
 datetime>=4.2		
 tqdm>=4.15.0
 pyyaml>=3
-cos-python-sdk-v5>=1.9.8
+cos-python-sdk-v5>=1.9.27