diff --git a/images/ironic/Dockerfile b/images/ironic/Dockerfile
index 614985a..aeb0ac4 100644
--- a/images/ironic/Dockerfile
+++ b/images/ironic/Dockerfile
@@ -12,7 +12,9 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-FROM registry.atmosphere.dev/library/openstack-venv-builder:zed AS build
+ARG RELEASE
+
+FROM registry.atmosphere.dev/library/openstack-venv-builder:${RELEASE} AS build
 ARG IRONIC_GIT_REF=995fa6c048297211deceddb05b00bbd34ef27eb6
 ADD --keep-git-dir=true https://opendev.org/openstack/ironic.git#${IRONIC_GIT_REF} /src/ironic
 RUN git -C /src/ironic fetch --unshallow
@@ -24,7 +26,7 @@
         sushy
 EOF
 
-FROM registry.atmosphere.dev/library/openstack-python-runtime:zed
+FROM registry.atmosphere.dev/library/openstack-python-runtime:${RELEASE}
 RUN <<EOF bash -xe
 apt-get update -qq
 apt-get install -qq -y --no-install-recommends \