diff --git a/Dockerfile b/Dockerfile
index 667ff1c..4efd571 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,8 +8,7 @@ FROM debian:buster-slim
 
 ENV DEBIAN_FRONTEND noninteractive
 
-# hadolint ignore=DL3008
-# hadolint ignore=DL3028
+# hadolint ignore=DL3008,DL3028
 RUN apt-get update && \
 	apt-get -y --no-install-recommends install \
 		ruby \