diff --git a/requirements-py2.txt b/requirements-py2.txt
index 61348779..260f535e 100644
--- a/requirements-py2.txt
+++ b/requirements-py2.txt
@@ -2,6 +2,8 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 
+pbr>=0.6,!=0.7,<1.0
+
 # Packages needed for using this library.
 
 # Only needed on python 2.6
diff --git a/requirements-py3.txt b/requirements-py3.txt
index ea305822..446e5798 100644
--- a/requirements-py3.txt
+++ b/requirements-py3.txt
@@ -2,6 +2,8 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 
+pbr>=0.6,!=0.7,<1.0
+
 # Packages needed for using this library.
 
 # Python 2->3 compatibility library.