diff --git a/requirements.txt b/requirements.txt
index 537de0fcf..a30ce1602 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,10 +2,10 @@
 # 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
 
 debtcollector>=1.2.0 # Apache-2.0
-keystoneauth1>=2.18.0 # Apache-2.0
+keystoneauth1>=2.20.0 # Apache-2.0
 oslo.config>=3.22.0 # Apache-2.0
 oslo.i18n>=2.1.0 # Apache-2.0
 oslo.serialization>=1.10.0 # Apache-2.0