diff --git a/requirements.txt b/requirements.txt
index 3aa1d109..ac728ea2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@
 future
 pbr!=2.1.0,>=2.0.0,!=4.0.0,!=4.0.1,!=4.0.2,!=4.0.3 # Apache-2.0
 cliff>=2.8.0 # Apache-2.0
-python-subunit>=1.3.0 # Apache-2.0/BSD
+python-subunit>=1.4.0 # Apache-2.0/BSD
 fixtures>=3.0.0 # Apache-2.0/BSD
 six>=1.10.0 # MIT
 testtools>=2.2.0 # MIT