diff --git a/requirements.txt b/requirements.txt
index 990811c3..28e96cc8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,5 +4,5 @@
 pbr>=1.6 # Apache-2.0
 six>=1.9.0 # MIT
 stevedore>=1.16.0 # Apache-2.0
-os-client-config!=1.19.0,>=1.13.1 # Apache-2.0
+os-client-config!=1.19.0,!=1.19.1,!=1.20.0,>=1.13.1 # Apache-2.0
 keystoneauth1>=2.10.0 # Apache-2.0