diff --git a/requirements.txt b/requirements.txt
index 875618dd..340d7ab1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,7 @@ netaddr!=0.7.16,>=0.7.12 # BSD
 six>=1.9.0 # MIT
 
 oslo.i18n>=2.1.0 # Apache-2.0
-oslo.utils>=3.5.0 # Apache-2.0
+oslo.utils>=3.9.0 # Apache-2.0
 
 # for the routing notifier
 PyYAML>=3.1.0 # MIT