diff --git a/requirements.txt b/requirements.txt
index da31f119..df52d78a 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
-cliff>=2.6.0 # Apache-2.0
+cliff>=2.8.0 # Apache-2.0
 iso8601>=0.1.11 # MIT
 netaddr!=0.7.16,>=0.7.13 # BSD
 requests>=2.14.2 # Apache-2.0
@@ -16,4 +16,4 @@ oslo.i18n!=3.15.2,>=2.1.0 # Apache-2.0
 oslo.log>=3.22.0 # Apache-2.0
 oslo.utils>=3.20.0 # Apache-2.0
 oslosphinx>=4.7.0 # Apache-2.0
-oslo.serialization>=1.10.0 # Apache-2.0
+oslo.serialization!=2.19.1,>=1.10.0 # Apache-2.0
diff --git a/test-requirements.txt b/test-requirements.txt
index 3722fcc0..eb093a48 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -8,7 +8,7 @@ flake8<2.6.0,>=2.5.4 # MIT
 pep8==1.5.7 # MIT
 pyflakes==0.8.1 # MIT
 python-subunit>=0.0.18 # Apache-2.0/BSD
-sphinx!=1.6.1,>=1.5.1 # BSD
+sphinx>=1.6.2 # BSD
 testrepository>=0.0.18 # Apache-2.0/BSD
 testtools>=1.4.0 # MIT