diff --git a/lower-constraints.txt b/lower-constraints.txt
index 25212399..58b9d60d 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -10,13 +10,13 @@ eventlet==0.18.2
 extras==1.0.0
 fasteners==0.7.0
 fixtures==3.0.0
-greenlet==0.4.10
+greenlet==0.4.15
 imagesize==0.7.1
 iso8601==0.1.11
 Jinja2==2.10
 keystoneauth1==3.4.0
 linecache2==1.0.0
-MarkupSafe==1.0
+MarkupSafe==1.1.1
 mccabe==0.2.1
 mox3==0.20.0
 msgpack-python==0.4.0
@@ -41,7 +41,7 @@ python-dateutil==2.5.3
 python-mimeparse==1.6.0
 python-subunit==1.0.0
 pytz==2013.6
-PyYAML==3.12
+PyYAML==3.13
 reno==3.1.0
 requests==2.14.2
 requestsexceptions==1.2.0