diff --git a/webapp/Dockerfile.demo b/webapp/Dockerfile.demo
index 28f6a11..661aaa6 100644
--- a/webapp/Dockerfile.demo
+++ b/webapp/Dockerfile.demo
@@ -1,5 +1,6 @@
 ARG docker_repo=zokradonh
 FROM ${docker_repo}/kopano_webapp
 
+# hadolint ignore=SC2016
 RUN sed -i '1s/^/<?php  $user="user".rand(1, 15); ?>\n/' /usr/share/kopano-webapp/server/includes/templates/login.php && \
     sed -i 's/id="password"/id="password" value="<?php echo $user; ?>"/' /usr/share/kopano-webapp/server/includes/templates/login.php