diff --git a/docker/red-ui/09-set-application-config.sh b/docker/red-ui/09-set-application-config.sh
index e98fe713f..06380f8a0 100755
--- a/docker/red-ui/09-set-application-config.sh
+++ b/docker/red-ui/09-set-application-config.sh
@@ -46,7 +46,7 @@ echo '{
           "AVAILABLE_NOTIFICATIONS_DAYS":"'"$AVAILABLE_NOTIFICATIONS_DAYS"'",
           "AVAILABLE_OLD_NOTIFICATIONS_MINUTES":"'"$AVAILABLE_OLD_NOTIFICATIONS_MINUTES"'",
           "NOTIFICATIONS_THRESHOLD":"'"$NOTIFICATIONS_THRESHOLD"'",
-          "WATERMARK_PREVIEW_PAPER_FORMAT":"'"$WATERMARK_PREVIEW_PAPER_FORMAT"'"
+          "WATERMARK_PREVIEW_PAPER_FORMAT":"'"$WATERMARK_PREVIEW_PAPER_FORMAT"'",
           "LANDING_PAGE_THEME":"'"$LANDING_PAGE_THEME"'"
        }' >/usr/share/nginx/html/ui/assets/config/config.json