diff --git a/lower-constraints.txt b/lower-constraints.txt
index 001f03c83..44c70fafc 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -14,18 +14,18 @@ debtcollector==1.2.0
 decorator==3.4.0
 deprecation==1.0
 docutils==0.11
-dogpile.cache==0.6.2
+dogpile.cache==0.6.5
 dulwich==0.15.0
 eventlet==0.18.2
 extras==1.0.0
 fasteners==0.7.0
 fixtures==3.0.0
 flake8-import-order==0.12
-flake8==2.5.5
+flake8==3.6.0
 future==0.16.0
 futurist==1.2.0
 greenlet==0.4.10
-hacking==1.1.0
+hacking==3.0.1
 idna==2.6
 imagesize==0.7.1
 iso8601==0.1.11
@@ -34,21 +34,21 @@ jmespath==0.9.0
 jsonpatch==1.16
 jsonpointer==1.13
 jsonschema==2.6.0
-keystoneauth1==3.4.0
+keystoneauth1==3.8.0
 kombu==4.0.0
 linecache2==1.0.0
 MarkupSafe==1.0
-mccabe==0.2.1
+mccabe==0.6.0
 monotonic==0.6
 msgpack-python==0.4.0
 munch==2.1.0
 netaddr==0.7.18
 netifaces==0.10.4
-openstacksdk==0.11.2
+openstacksdk==0.15.0
 os-client-config==1.28.0
 os-service-types==1.2.0
 osc-lib==1.12.0
-oslo.concurrency==3.25.0
+oslo.concurrency==3.26.0
 oslo.config==5.2.0
 oslo.context==2.19.2
 oslo.i18n==3.15.3
@@ -69,9 +69,9 @@ pika==0.10.0
 positional==1.2.1
 prettytable==0.7.2
 pyasn1==0.1.8
-pycodestyle==2.3.1
+pycodestyle==2.4.0
 pycparser==2.18
-pyflakes==0.8.1
+pyflakes==2.0.0
 Pygments==2.2.0
 pyinotify==0.9.6
 pyOpenSSL==17.1.0
@@ -86,7 +86,7 @@ python-novaclient==9.1.0
 python-openstackclient==3.12.0
 python-subunit==1.0.0
 pytz==2013.6
-PyYAML==3.13
+PyYAML==5.3.1
 repoze.lru==0.7
 requests-mock==1.2.0
 requests==2.14.2
@@ -97,7 +97,7 @@ simplejson==3.5.1
 snowballstemmer==1.2.1
 statsd==3.2.1
 stestr==2.0.0
-stevedore==1.20.0
+stevedore==2.0.1
 tempest==17.1.0
 tenacity==3.2.1
 testscenarios==0.4
diff --git a/requirements.txt b/requirements.txt
index d10083c26..b08551ddf 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,7 @@ oslo.log>=3.36.0 # Apache-2.0
 oslo.serialization!=2.19.1,>=2.18.0 # Apache-2.0
 oslo.utils>=3.33.0 # Apache-2.0
 os-client-config>=1.28.0 # Apache-2.0
-keystoneauth1>=3.4.0 # Apache-2.0
+keystoneauth1>=3.8.0 # Apache-2.0
 # keystoneclient is used only by neutronclient.osc.utils
 # TODO(amotoki): Drop this after osc.utils has no dependency on keystoneclient
 python-keystoneclient>=3.8.0 # Apache-2.0