diff --git a/requirements.txt b/requirements.txt
index 33052ed..7f4022d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,7 +11,7 @@ oslo.cache>=1.5.0 # Apache-2.0
 oslo.config>=3.22.0 # Apache-2.0
 oslo.messaging>=5.19.0 # Apache-2.0
 oslo.log>=3.22.0 # Apache-2.0
-oslo.db>=4.19.0 # Apache-2.0
+oslo.db>=4.21.1 # Apache-2.0
 keystoneauth1>=2.20.0 # Apache-2.0
 python-keystoneclient>=3.8.0 # Apache-2.0
 requests!=2.12.2,!=2.13.0,>=2.10.0 # Apache-2.0