diff --git a/requirements.txt b/requirements.txt
index bb8df5e..9f8c683 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,9 +2,9 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 
-pbr>=1.8 # Apache-2.0
+pbr!=2.1.0,>=2.0.0 # Apache-2.0
 
-tempest>=12.1.0  # Apache-2.0
-cryptography!=1.3.0,>=1.0 # BSD/Apache-2.0
+tempest>=17.1.0 # Apache-2.0
+cryptography!=2.0,>=1.9 # BSD/Apache-2.0
 
-oslo.config>=3.22.0 # Apache-2.0
+oslo.config>=5.1.0 # Apache-2.0