diff --git a/Containerfiles/HorizonRXT-Containerfile b/Containerfiles/HorizonRXT-Containerfile
index d1ae0d30c..b5c84efcf 100644
--- a/Containerfiles/HorizonRXT-Containerfile
+++ b/Containerfiles/HorizonRXT-Containerfile
@@ -1,6 +1,5 @@
 ARG RELEASE=master
-ARG VERSION=${RELEASE}-ubuntu_jammy
-FROM openstackhelm/horizon:$VERSION
+FROM openstackhelm/horizon:${RELEASE}-ubuntu_jammy
 RUN /var/lib/openstack/bin/pip install --constraint=https://releases.openstack.org/constraints/upper/${RELEASE} \
                                heat-dashboard \
                                octavia-dashboard