diff --git a/requirements.txt b/requirements.txt
index b3064759b6f..8fd3561edcb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -39,7 +39,7 @@ PasteDeploy>=1.5.0 # MIT
 PrettyTable<0.8,>=0.7.1 # BSD
 psutil>=3.2.2 # BSD
 pyparsing>=2.1.0 # MIT
-python-barbicanclient!=4.5.0,!=4.5.1,>=4.0.0 # Apache-2.0
+python-barbicanclient>=4.5.2 # Apache-2.0
 python-glanceclient>=2.8.0 # Apache-2.0
 python-keystoneclient>=3.8.0 # Apache-2.0
 python-novaclient>=9.1.0 # Apache-2.0
@@ -64,4 +64,4 @@ os-win>=3.0.0 # Apache-2.0
 tooz>=1.58.0 # Apache-2.0
 google-api-python-client>=1.4.2 # Apache-2.0
 castellan>=0.16.0 # Apache-2.0
-cryptography!=2.0,>=1.9 # BSD/Apache-2.0
+cryptography>=2.1 # BSD/Apache-2.0