diff --git a/requirements.txt b/requirements.txt
index 76ecae7..a072ac0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,4 +3,4 @@
 # process, which may cause wedges in the gate later.
 
 pbr!=2.1.0,>=2.0.0 # Apache-2.0
-six>=1.9.0 # MIT
+six>=1.10.0 # MIT
diff --git a/test-requirements.txt b/test-requirements.txt
index 31d53a3..01a8377 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -5,13 +5,13 @@
 hacking!=0.13.0,<0.14,>=0.12.0 # Apache-2.0
 
 coverage!=4.4,>=4.0 # 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
 openstackdocstheme>=1.17.0 # Apache-2.0
 oslotest>=1.10.0 # Apache-2.0
 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
 
 # releasenotes
 reno>=2.5.0 # Apache-2.0