diff --git a/requirements.txt b/requirements.txt
index 947840e6..a205097e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ Babel!=2.4.0,>=2.3.4 # BSD
 cliff!=2.9.0,>=2.8.0 # Apache-2.0
 PyYAML>=3.10 # MIT
 python-dateutil>=2.4.2 # BSD
-six>=1.9.0 # MIT
+six>=1.10.0 # MIT
 tosca-parser>=0.8.1 # Apache-2.0
 keystoneauth1>=3.2.0 # Apache-2.0
 python-novaclient>=9.1.0 # Apache-2.0
diff --git a/test-requirements.txt b/test-requirements.txt
index da69d4f3..36d81b1d 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -6,8 +6,8 @@ coverage!=4.4,>=4.0 # Apache-2.0
 fixtures>=3.0.0 # Apache-2.0/BSD
 oslotest>=1.10.0 # Apache-2.0
 oslosphinx>=4.7.0 # Apache-2.0
-python-subunit>=0.0.18 # Apache-2.0/BSD
+python-subunit>=1.0.0 # Apache-2.0/BSD
 sphinx>=1.6.2 # BSD
 testrepository>=0.0.18 # Apache-2.0/BSD
 testscenarios>=0.4 # Apache-2.0/BSD
-testtools>=1.4.0 # MIT
+testtools>=2.2.0 # MIT