diff --git a/lower-constraints.txt b/lower-constraints.txt
index 5e19648f3..fb4397da5 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -36,18 +36,18 @@ os-service-types==1.2.0
 os-traits==2.4.0
 oslo.concurrency==3.26.0
 oslo.config==6.7.0
-oslo.context==2.19.2
+oslo.context==2.21.0
 oslo.db==4.40.0
-oslo.i18n==3.15.3
-oslo.log==3.36.0
+oslo.i18n==3.20.0
+oslo.log==4.3.0
 oslo.middleware==3.31.0
 oslo.policy==1.35.0
-oslo.serialization==2.18.0
+oslo.serialization==2.25.0
 oslo.upgradecheck==0.2.0
 oslo.utils==3.37.0
 oslotest==3.4.0
 osprofiler==1.4.0
-pbr==2.0.0
+pbr==3.1.1
 pep8==1.5.7
 pluggy==0.6.0
 ply==3.11
@@ -58,7 +58,7 @@ pycadf==2.7.0
 PyMySQL==0.8.0
 pyparsing==2.2.0
 pytest==3.4.2
-python-dateutil==2.5.3
+python-dateutil==2.7.0
 python-editor==1.0.3
 python-keystoneclient==3.15.0
 python-mimeparse==1.6.0
diff --git a/requirements.txt b/requirements.txt
index f1f55d4b2..90c1a14ec 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@
 # 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
 SQLAlchemy>=1.2.19 # MIT
 keystonemiddleware>=4.18.0 # Apache-2.0
 Routes>=2.3.1 # MIT
@@ -12,9 +12,9 @@ requests>=2.25.0 # Apache-2.0
 setuptools!=24.0.0,!=34.0.0,!=34.0.1,!=34.0.2,!=34.0.3,!=34.1.0,!=34.1.1,!=34.2.0,!=34.3.0,!=34.3.1,!=34.3.2,!=36.2.0,>=21.0.0 # PSF/ZPL
 oslo.concurrency>=3.26.0 # Apache-2.0
 oslo.config>=6.7.0 # Apache-2.0
-oslo.context>=2.19.2 # Apache-2.0
-oslo.log>=3.36.0 # Apache-2.0
-oslo.serialization!=2.19.1,>=2.18.0 # Apache-2.0
+oslo.context>=2.21.0 # Apache-2.0
+oslo.log>=4.3.0 # Apache-2.0
+oslo.serialization>=2.25.0 # Apache-2.0
 oslo.utils>=3.37.0 # Apache-2.0
 oslo.db>=4.40.0 # Apache-2.0
 oslo.policy>=1.35.0 # Apache-2.0