diff --git a/requirements.txt b/requirements.txt
index 37ebaf6..58f7094 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@
 keystoneauth1>=2.18.0 # Apache-2.0
 osc-lib>=1.2.0 # Apache-2.0
 oslo.i18n>=2.1.0 # 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
 python-openstackclient>=3.3.0 # Apache-2.0
 requests!=2.12.2,!=2.13.0,>=2.10.0 # Apache-2.0