diff --git a/requirements.txt b/requirements.txt
index 21c27c84..752d2162 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -14,7 +14,7 @@ oslo.i18n>=2.1.0 # Apache-2.0
 oslo.log>=1.14.0 # Apache-2.0
 oslo.messaging>=4.5.0 # Apache-2.0
 oslo.serialization>=1.10.0 # Apache-2.0
-oslo.utils>=3.5.0 # Apache-2.0
+oslo.utils>=3.9.0 # Apache-2.0
 oslo.rootwrap>=2.0.0 # Apache-2.0
 oslo.service>=1.10.0 # Apache-2.0
 WebOb>=1.2.3 # MIT