diff --git a/Dockerfile b/Dockerfile
index 41d8c63..4bd53ac 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -47,6 +47,7 @@ RUN set -ex; \
 		| xargs -rt apt-mark manual; \
 	\
 	apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false; \
+	apt-get clean ;\
 	rm -rf /var/lib/apt/lists/* ;\
 	\
 	# enable mod_rewrite