diff --git a/requirements.txt b/requirements.txt
index f834e9c..eee6283 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@
 cliff>=2.3.0 # Apache-2.0
 jsonschema!=2.5.0,<3.0.0,>=2.0.0 # MIT
 osc-lib>=1.2.0 # Apache-2.0
-oslo.utils>=3.18.0 # Apache-2.0
+oslo.utils>=3.20.0 # Apache-2.0
 pbr>=1.8 # Apache-2.0
 keystoneauth1>=2.18.0 # Apache-2.0
 requests!=2.12.2,!=2.13.0,>=2.10.0 # Apache-2.0