diff --git a/requirements.txt b/requirements.txt
index e35b9f7911..7a4475357b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -31,7 +31,7 @@ oslo.log>=1.14.0 # Apache-2.0
 oslo.middleware>=3.0.0 # Apache-2.0
 oslo.policy>=1.9.0 # Apache-2.0
 oslo.serialization>=1.10.0 # Apache-2.0
-oslo.utils>=3.14.0 # Apache-2.0
+oslo.utils>=3.15.0 # Apache-2.0
 oauthlib>=0.6 # BSD
 pysaml2<4.0.3,>=2.4.0 # Apache-2.0
 dogpile.cache>=0.6.1 # BSD