diff --git a/requirements.txt b/requirements.txt
index 7a5b5384..1bc40073 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@
 # process, which may cause wedges in the gate later.
 
 keystoneauth1>=2.14.0 # Apache-2.0
-oslo.config>=3.14.0 # Apache-2.0
+oslo.config!=3.18.0,>=3.14.0 # Apache-2.0
 oslo.context>=2.9.0 # Apache-2.0
 oslo.i18n>=2.1.0 # Apache-2.0
 oslo.serialization>=1.10.0 # Apache-2.0