diff --git a/lower-constraints.txt b/lower-constraints.txt
index 5a766a06bb..19198180b4 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -34,7 +34,7 @@ future==0.16.0
 futurist==1.6.0
 gitdb2==2.0.3
 GitPython==2.1.8
-greenlet==0.4.15
+greenlet==0.4.17
 idna==2.6
 iso8601==0.1.12
 Jinja2==2.10
@@ -43,7 +43,7 @@ jsonpatch==1.21
 jsonpointer==2.0
 jsonschema==2.6.0
 keystoneauth1==3.18.0
-keystonemiddleware==4.17.0
+keystonemiddleware==5.1.0
 kombu==5.0.1
 linecache2==1.0.0
 lxml==4.5.0
@@ -65,19 +65,19 @@ os-service-types==1.2.0
 osc-lib==1.10.0
 oslo.cache==1.26.0
 oslo.concurrency==3.26.0
-oslo.config==5.2.0
-oslo.context==2.19.2
+oslo.config==6.0.0
+oslo.context==2.22.0
 oslo.db==6.0.0
-oslo.i18n==3.15.3
-oslo.log==3.36.0
+oslo.i18n==3.20.0
+oslo.log==4.3.0
 oslo.messaging==5.29.0
 oslo.middleware==3.31.0
-oslo.policy==1.30.0
+oslo.policy==3.6.0
 oslo.reports==1.18.0
-oslo.serialization==2.18.0
+oslo.serialization==2.25.0
 oslo.service==1.24.0
 oslo.upgradecheck==0.1.0
-oslo.utils==3.37.0
+oslo.utils==3.40.0
 oslo.versionedobjects==1.31.2
 oslotest==3.2.0
 osprofiler==1.4.0
@@ -85,7 +85,7 @@ packaging==17.1
 paramiko==2.7.1
 Paste==2.0.3
 PasteDeploy==1.5.0
-pbr==2.0.0
+pbr==3.1.1
 pika-pool==0.1.3
 pika==0.10.0
 ply==3.11
@@ -129,7 +129,7 @@ python-vitrageclient==2.7.0
 python-zaqarclient==1.3.0
 python-zunclient==3.4.0
 pytz==2013.6
-PyYAML==3.13
+PyYAML==5.1
 repoze.lru==0.7
 requests==2.14.2
 requestsexceptions==1.4.0
diff --git a/requirements.txt b/requirements.txt
index 3bf25655e1..e416eb3c49 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,33 +2,33 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 
-pbr!=2.1.0,>=2.0.0 # Apache-2.0
+pbr>=3.1.1 # Apache-2.0
 Babel!=2.4.0,>=2.3.4 # BSD
 croniter>=0.3.4 # MIT License
 cryptography>=2.5 # BSD/Apache-2.0
 debtcollector>=1.19.0  # Apache-2.0
 eventlet!=0.18.3,!=0.20.1,!=0.21.0,!=0.23.0,!=0.25.0,>=0.18.2 # MIT
 keystoneauth1>=3.18.0 # Apache-2.0
-keystonemiddleware>=4.17.0 # Apache-2.0
+keystonemiddleware>=5.1.0 # Apache-2.0
 lxml!=3.7.0,>=4.5.0 # BSD
 netaddr>=0.7.18 # BSD
 neutron-lib>=1.14.0  # Apache-2.0
 openstacksdk>=0.11.2 # Apache-2.0
 oslo.cache>=1.26.0 # Apache-2.0
-oslo.config>=5.2.0 # Apache-2.0
+oslo.config>=6.0.0 # 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>=6.0.0 # Apache-2.0
-oslo.i18n>=3.15.3 # Apache-2.0
-oslo.log>=3.36.0 # Apache-2.0
+oslo.i18n>=3.20.0 # Apache-2.0
+oslo.log>=4.3.0 # Apache-2.0
 oslo.messaging>=5.29.0 # Apache-2.0
 oslo.middleware>=3.31.0 # Apache-2.0
-oslo.policy>=1.30.0 # Apache-2.0
+oslo.policy>=3.6.0 # Apache-2.0
 oslo.reports>=1.18.0 # Apache-2.0
-oslo.serialization!=2.19.1,>=2.18.0 # Apache-2.0
+oslo.serialization>=2.25.0 # Apache-2.0
 oslo.service!=1.28.1,>=1.24.0 # Apache-2.0
 oslo.upgradecheck>=0.1.0 # Apache-2.0
-oslo.utils>=3.37.0 # Apache-2.0
+oslo.utils>=3.40.0 # Apache-2.0
 osprofiler>=1.4.0 # Apache-2.0
 oslo.versionedobjects>=1.31.2 # Apache-2.0
 PasteDeploy>=1.5.0 # MIT
@@ -57,7 +57,7 @@ python-vitrageclient>=2.7.0 # Apache-2.0
 python-zaqarclient>=1.3.0 # Apache-2.0
 python-zunclient>=3.4.0 # Apache-2.0
 pytz>=2013.6 # MIT
-PyYAML>=3.13 # MIT
+PyYAML>=5.1 # MIT
 requests>=2.14.2 # Apache-2.0
 tenacity>=6.1.0 # Apache-2.0
 Routes>=2.3.1 # MIT