diff --git a/requirements.txt b/requirements.txt
index 79973be808..e79068ad1b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -33,7 +33,7 @@ oslo.i18n>=2.1.0 # Apache-2.0
 oslo.middleware>=3.0.0 # Apache-2.0
 oslo.serialization>=1.10.0 # Apache-2.0
 oslo.service>=1.10.0 # Apache-2.0
-oslo.utils>=3.15.0 # Apache-2.0
+oslo.utils>=3.16.0 # Apache-2.0
 oslo.concurrency>=3.8.0 # Apache-2.0
 PyMySQL>=0.6.2 # MIT License
 Babel>=2.3.4 # BSD
diff --git a/test-requirements.txt b/test-requirements.txt
index 71ace1b61c..6bfce31208 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -24,7 +24,7 @@ testrepository>=0.0.18 # Apache-2.0/BSD
 pymongo!=3.1,>=3.0.2 # Apache-2.0
 redis>=2.10.0 # MIT
 psycopg2>=2.5 # LGPL/ZPL
-cassandra-driver>=2.1.4 # Apache-2.0
+cassandra-driver!=3.6.0,>=2.1.4 # Apache-2.0
 pycrypto>=2.6 # Public Domain
 couchdb>=0.8 # Apache-2.0
 os-testr>=0.7.0 # Apache-2.0