diff --git a/heat_tempest_plugin/config.py b/heat_tempest_plugin/config.py
index 877574f..4992f17 100644
--- a/heat_tempest_plugin/config.py
+++ b/heat_tempest_plugin/config.py
@@ -128,6 +128,7 @@
                     "succeed."),
     cfg.IntOpt('ip_version_for_ssh',
                default=4,
+               choices=[4, 6],
                help="IP version used for SSH connections."),
     cfg.IntOpt('ssh_channel_timeout',
                default=60,
diff --git a/requirements.txt b/requirements.txt
index d3e2e28..91a26fa 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@
 # you find any incorrect lower bounds, let us know or propose a fix.
 
 keystoneauth1>=3.4.0 # Apache-2.0
-oslo.config>=5.2.0 # Apache-2.0
+oslo.config>=9.3.0 # Apache-2.0
 oslo.log>=3.36.0 # Apache-2.0
 oslo.messaging>=5.29.0 # Apache-2.0
 os-collect-config>=5.0.0 # Apache-2.0