diff --git a/requirements.txt b/requirements.txt
index 1b384a197..1e36f8f49 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,7 @@ keystoneauth1>=2.1.0 # Apache-2.0
 oslo.config>=3.9.0 # Apache-2.0
 oslo.i18n>=2.1.0 # 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
 positional>=1.0.1 # Apache-2.0
 requests>=2.10.0 # Apache-2.0
 six>=1.9.0 # MIT