diff --git a/debian.dockerfile b/debian.dockerfile
index 477e124..beec4a5 100644
--- a/debian.dockerfile
+++ b/debian.dockerfile
@@ -9,3 +9,4 @@ RUN sed "s|deb.debian.org|${DEB_MIRRORS}|" /etc/apt/sources.list.d/debian.source
     apt update && \
     apt upgrade -y && \
     rm -rf /var/lib/apt/lists/*
+