diff --git a/requirements.txt b/requirements.txt
index eda1b6b3b2..69a3a93e1c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -41,7 +41,7 @@ python-glanceclient>=0.18.0
 python-heatclient>=0.3.0
 python-novaclient!=2.33.0,>=2.28.1
 python-keystoneclient!=1.8.0,>=1.6.0
-requests!=2.8.0,>=2.5.2
+requests!=2.8.0,!=2.9.0,>=2.5.2
 six>=1.9.0
 stevedore>=1.5.0 # Apache-2.0
 taskflow>=1.16.0