diff --git a/requirements.txt b/requirements.txt
index 94c66d87..fb15dc24 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 
-pbr>=2.0.0 # Apache-2.0
+pbr!=2.1.0,>=2.0.0 # Apache-2.0
 PrettyTable<0.8,>=0.7.1 # BSD
 python-openstackclient>=3.3.0 # Apache-2.0
 keystoneauth1>=2.18.0 # Apache-2.0