diff --git a/requirements.txt b/requirements.txt
index 361bda10..537dfa6e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
-pbr>=0.5.21,<1.0
+pbr>=0.6,!=0.7,<1.0
 argparse
 PrettyTable>=0.7,<0.8
 requests>=1.1
 simplejson>=2.0.9
 Babel>=1.3
-six>=1.4.1
+six>=1.6.0
diff --git a/test-requirements.txt b/test-requirements.txt
index cd052a67..3bb77ace 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,7 +1,7 @@
 hacking>=0.8.0,<0.9
 discover
 sphinx>=1.1.2,<1.2
-testrepository>=0.0.17
-testtools>=0.9.32
+testrepository>=0.0.18
+testtools>=0.9.34
 mock>=1.0
-httplib2
+httplib2>=0.7.5