diff --git a/lower-constraints.txt b/lower-constraints.txt
index 8030f5ed450..00ca7dba9ab 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -15,7 +15,7 @@ cliff==2.11.0
 cmd2==0.8.1
 contextlib2==0.5.5
 coverage==4.0
-cryptography==2.1
+cryptography==2.1.4
 cursive==0.2.1
 ddt==1.2.1
 debtcollector==1.19.0
@@ -30,7 +30,7 @@ eventlet==0.22.0
 extras==1.0.0
 fasteners==0.14.1
 fixtures==3.0.0
-flake8==2.5.5
+flake8==3.7.0
 flake8-import-order==0.18.1
 flake8-logging-format==0.6.0
 future==0.16.0
@@ -39,7 +39,7 @@ gitdb2==2.0.3
 GitPython==2.1.8
 google-api-python-client==1.4.2
 greenlet==0.4.10
-hacking==2.0.0
+hacking==3.0
 httplib2==0.9.1
 idna==2.6
 imagesize==1.0.0
@@ -55,7 +55,7 @@ linecache2==1.0.0
 lxml==3.4.1
 Mako==1.0.7
 MarkupSafe==1.0
-mccabe==0.2.1
+mccabe==0.6.0
 mock==2.0.0
 monotonic==1.4
 msgpack==0.5.6
@@ -67,11 +67,11 @@ openstackdocstheme==2.0.0
 os-api-ref==1.4.0
 os-brick==3.0.3
 os-client-config==1.29.0
-os-win==3.0.0
+os-win==4.1.0
 oslo.cache==1.29.0
 oslo.concurrency==3.26.0
 oslo.config==5.2.0
-oslo.context==2.19.2
+oslo.context==2.22.0
 oslo.db==4.35.0
 oslo.i18n==3.15.3
 oslo.log==3.36.0
@@ -82,7 +82,7 @@ oslo.privsep==1.32.0
 oslo.reports==1.18.0
 oslo.rootwrap==5.8.0
 oslo.serialization==2.18.0
-oslo.service==1.24.0
+oslo.service==1.31.0
 oslo.utils==3.34.0
 oslo.versionedobjects==1.31.2
 oslo.vmware==2.35.0
@@ -102,7 +102,7 @@ pyasn1==0.4.2
 pycadf==2.7.0
 pycodestyle==2.5.0
 pycparser==2.18
-pyflakes==0.8.1
+pyflakes==2.1.0
 Pygments==2.2.0
 pyinotify==0.9.6
 PyMySQL==0.7.6
@@ -117,11 +117,11 @@ python-glanceclient==2.15.0
 python-keystoneclient==3.15.0
 python-mimeparse==1.6.0
 python-novaclient==9.1.0
-python-subunit==1.2.0
+python-subunit==1.3.0
 python-swiftclient==3.2.0
-pytz==2013.6
+pytz==2015.7
 pyudev==0.21.0
-PyYAML==3.12
+PyYAML==3.13
 reno==2.5.0
 repoze.lru==0.7
 requests==2.14.2
diff --git a/requirements.txt b/requirements.txt
index 15907e5d64f..7c460a632f6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,7 +16,7 @@ lxml!=3.7.0,>=3.4.1 # BSD
 oauth2client!=4.0.0,>=1.5.0 # Apache-2.0
 oslo.config>=5.2.0 # Apache-2.0
 oslo.concurrency>=3.26.0 # Apache-2.0
-oslo.context>=2.19.2 # Apache-2.0
+oslo.context>=2.22.0 # Apache-2.0
 oslo.db>=4.35.0 # Apache-2.0
 oslo.log>=3.36.0 # Apache-2.0
 oslo.messaging>=6.4.0 # Apache-2.0
@@ -26,7 +26,7 @@ oslo.privsep>=1.32.0 # Apache-2.0
 oslo.reports>=1.18.0 # Apache-2.0
 oslo.rootwrap>=5.8.0 # Apache-2.0
 oslo.serialization!=2.19.1,>=2.18.0 # Apache-2.0
-oslo.service!=1.28.1,>=1.24.0 # Apache-2.0
+oslo.service>=1.31.0 # Apache-2.0
 oslo.upgradecheck>=0.1.0 # Apache-2.0
 oslo.utils>=3.34.0 # Apache-2.0
 oslo.versionedobjects>=1.31.2 # Apache-2.0
@@ -41,7 +41,7 @@ python-glanceclient>=2.15.0 # Apache-2.0
 python-keystoneclient>=3.15.0 # Apache-2.0
 python-novaclient>=9.1.0 # Apache-2.0
 python-swiftclient>=3.2.0 # Apache-2.0
-pytz>=2013.6 # MIT
+pytz>=2015.7 # MIT
 requests>=2.14.2,!=2.20.0 # Apache-2.0
 retrying!=1.3.0,>=1.2.3 # Apache-2.0
 Routes>=2.3.1 # MIT
@@ -56,9 +56,9 @@ WebOb>=1.7.1 # MIT
 oslo.i18n>=3.15.3 # Apache-2.0
 oslo.vmware>=2.35.0 # Apache-2.0
 os-brick>=3.0.3 # Apache-2.0
-os-win>=3.0.0 # Apache-2.0
+os-win>=4.1.0 # Apache-2.0
 tooz>=1.58.0 # Apache-2.0
 google-api-python-client>=1.4.2 # Apache-2.0
 castellan>=0.16.0 # Apache-2.0
-cryptography>=2.1 # BSD/Apache-2.0
+cryptography>=2.1.4 # BSD/Apache-2.0
 cursive>=0.2.1 # Apache-2.0