diff --git a/requirements.txt b/requirements.txt
index 845022a080..e1e68a381f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@
 # ascii betical order.
 
 Babel!=2.4.0,>=2.3.4 # BSD
-PyYAML>=3.10 # MIT
+PyYAML>=3.10.0 # MIT
 SQLAlchemy!=1.1.5,!=1.1.6,!=1.1.7,!=1.1.8,>=1.0.10 # MIT
 WSME>=0.8 # MIT
 WebOb>=1.7.1 # MIT
diff --git a/test-requirements.txt b/test-requirements.txt
index 3edc3f0f93..d07ac57f50 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -11,7 +11,7 @@ coverage!=4.4,>=4.0 # Apache-2.0
 doc8 # Apache-2.0
 fixtures>=3.0.0 # Apache-2.0/BSD
 hacking!=0.13.0,<0.14,>=0.12.0 # Apache-2.0
-mock>=2.0.0 # BSD
+mock>=2.0 # BSD
 openstackdocstheme>=1.16.0 # Apache-2.0
 oslotest>=1.10.0 # Apache-2.0
 osprofiler>=1.4.0 # Apache-2.0
@@ -25,4 +25,4 @@ testrepository>=0.0.18 # Apache-2.0/BSD
 testscenarios>=0.4 # Apache-2.0/BSD
 testtools>=1.4.0 # MIT
 # releasenotes
-reno>=2.5.0 # Apache-2.0
+reno!=2.3.1,>=1.8.0 # Apache-2.0