diff --git a/requirements.txt b/requirements.txt
index c9a5ac61..7010c4b0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 pbr!=2.1.0,>=2.0.0 # Apache-2.0
-keystoneauth1>=2.21.0 # Apache-2.0
+keystoneauth1!=3.0.0,>=2.21.0 # Apache-2.0
 iso8601>=0.1.11 # MIT
 oslo.i18n!=3.15.2,>=2.1.0 # Apache-2.0
 oslo.serialization!=2.19.1,>=1.10.0 # Apache-2.0