diff --git a/Dockerfile b/Dockerfile
index 2b97802..22cec4a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -10,6 +10,7 @@ RUN apt-get update && apt-get install -y lsb-release gpg && \
 
 RUN apt-get update && apt-get install -y \
     supervisor procps smbclient redis-server imagemagick \
+  && apt-get clean \
   && rm -rf /var/lib/apt/lists/* \
   && mkdir /var/log/supervisord /var/run/supervisord