diff --git a/requirements.txt b/requirements.txt
index 9ec0f5564..571d4a266 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@
 # process, which may cause wedges in the gate later.
 
 # pbr should be first
-pbr>=2.0.0 # Apache-2.0
+pbr!=2.1.0,>=2.0.0 # Apache-2.0
 
 oslo.config>=3.22.0 # Apache-2.0
 oslo.log>=3.22.0 # Apache-2.0