diff --git a/Dockerfile b/Dockerfile
index e0af6548261d24fd283f7b46a56b0dc9d6ee9bd1..0b6e8973d51406a29b593a320ee68ba1ba0e90d5 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 ARG DOCKER_REGISTRY=registry.cyberbrain.pw
-FROM $DOCKER_REGISTRY/tools/docker/ubuntu:latest AS source
+FROM $DOCKER_REGISTRY/tools/docker/ubuntu/main AS runtime
 
 RUN set -ex && \
     apt-get update -y && \
@@ -13,3 +13,5 @@ RUN set -ex && \
 
 VOLUME [ "/backup" ]
 ENTRYPOINT [ "/entrypoint.sh" ]
+
+FROM runtime AS release