diff --git a/Dockerfile b/Dockerfile
index 8f0249029e10a24480e04397c3ffd7f6d270727e..bba0d2ccb2433ce45d5c79093f84b32373248e5f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,4 @@
-ARG DOCKER_REGISTRY=registry.cyberbrain.pw
-FROM $DOCKER_REGISTRY/tools/docker/shellcheck:latest AS runtime
+FROM koalaman/shellcheck-alpine:latest AS runtime
 COPY entrypoint.sh /entrypoint.sh
 RUN set -ex && \
     chmod a+x /entrypoint.sh