diff --git a/Dockerfile b/Dockerfile
index 8c8736e..46a5877 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -29,6 +29,7 @@ ENV DEBIAN_FRONTEND=noninteractive
 RUN apt-get update -y
 RUN apt-get install -y squid
 RUN apt-get install -y apache2-utils
+RUN RUN apt-get clean
 
 COPY entry.sh /
 COPY squid.conf /etc/squid/squid.conf