diff --git a/requirements.txt b/requirements.txt
index 83158ed2..969f09f2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,5 +8,5 @@ six>=1.10.0 # MIT
 stevedore>=1.20.0 # Apache-2.0
 oslo.i18n>=3.15.3 # Apache-2.0
 rfc3986>=0.3.1 # Apache-2.0
-PyYAML>=3.10 # MIT
-enum34>=1.0.4;python_version=='2.7' or python_version=='2.6' or python_version=='3.3'  # BSD
+PyYAML>=3.12 # MIT
+enum34>=1.0.4;python_version=='2.7' or python_version=='2.6' or python_version=='3.3' # BSD
diff --git a/test-requirements.txt b/test-requirements.txt
index 102fedc2..ab8904a3 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -15,7 +15,7 @@ oslotest>=3.2.0 # Apache-2.0
 coverage!=4.4,>=4.0 # Apache-2.0
 
 # this is required for the docs build jobs
-sphinx!=1.6.6,>=1.6.2 # BSD
+sphinx!=1.6.6,!=1.6.7,>=1.6.2 # BSD
 openstackdocstheme>=1.18.1 # Apache-2.0
 reno>=2.5.0 # Apache-2.0