diff --git a/requirements.txt b/requirements.txt
index 7f0f6af..2cb73cc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,6 +2,6 @@
 # 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
 
 diskimage-builder!=1.6.0,!=1.7.0,!=1.7.1,>=1.1.2 # Apache-2.0