diff --git a/1.1.21.2/Dockerfile b/1.1.21.2/Dockerfile
index 6684829..ade092d 100644
--- a/1.1.21.2/Dockerfile
+++ b/1.1.21.2/Dockerfile
@@ -48,6 +48,8 @@ RUN apk add --no-cache --virtual .build-deps \
 			| xargs -r apk info --installed || true \
 			| sort -u \
 	)" \
+# Package list is programmatically generated.
+# hadolint ignore=DL3018
 	&& apk add --virtual .gearmand-rundeps $runDeps \
 	&& apk del .build-deps \
 	&& /usr/local/sbin/gearmand --version