diff --git a/requirements.txt b/requirements.txt
index 174ff1a12..93d737c0d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -17,7 +17,7 @@ six>=1.9.0 # MIT
 oslo.cache>=1.5.0 # Apache-2.0
 oslo.config>=3.22.0 # Apache-2.0
 oslo.context>=2.12.0 # Apache-2.0
-oslo.i18n>=2.1.0 # Apache-2.0
+oslo.i18n!=3.15.2,>=2.1.0 # Apache-2.0
 oslo.log>=3.22.0 # Apache-2.0
 oslo.messaging>=5.19.0 # Apache-2.0
 oslo.reports>=0.6.0 # Apache-2.0
diff --git a/test-requirements.txt b/test-requirements.txt
index cb2e51e96..92489fde8 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -15,19 +15,19 @@ websocket-client>=0.32.0 # LGPLv2+
 PyMySQL>=0.7.6 # MIT License
 
 # Unit testing
-coverage>=4.0 # Apache-2.0
+coverage!=4.4,>=4.0 # Apache-2.0
 ddt>=1.0.1 # MIT
 fixtures>=3.0.0 # Apache-2.0/BSD
 python-subunit>=0.0.18 # Apache-2.0/BSD
 testscenarios>=0.4 # Apache-2.0/BSD
 testrepository>=0.0.18 # Apache-2.0/BSD
 testtools>=1.4.0 # MIT
-oslo.db>=4.19.0 # Apache-2.0
+oslo.db>=4.21.1 # Apache-2.0
 testresources>=0.2.4 # Apache-2.0/BSD
 os-testr>=0.8.0 # Apache-2.0
 
 # Documentation
-sphinx>=1.5.1 # BSD
+sphinx!=1.6.1,>=1.5.1 # BSD
 oslosphinx>=4.7.0 # Apache-2.0
 openstackdocstheme>=1.5.0 # Apache-2.0
 oslotest>=1.10.0 # Apache-2.0