diff --git a/requirements.txt b/requirements.txt
index e369ed35e1c..6c8487248e9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -53,7 +53,7 @@ oslo.middleware>=3.31.0 # Apache-2.0
 psutil>=3.2.2 # BSD
 oslo.versionedobjects>=1.28.0 # Apache-2.0
 os-brick>=1.15.2 # Apache-2.0
-os-traits>=0.3.2 # Apache-2.0
+os-traits>=0.4.0 # Apache-2.0
 os-vif>=1.7.0 # Apache-2.0
 os-win>=2.0.0 # Apache-2.0
 castellan>=0.14.0 # Apache-2.0