diff --git a/deps/Dockerfile.web b/deps/Dockerfile.web
index 9983426..412742f 100644
--- a/deps/Dockerfile.web
+++ b/deps/Dockerfile.web
@@ -1,7 +1,8 @@
 FROM alpine
 
 # install openvpn and the transmission-daemon
-RUN apk --update add openvpn transmission-daemon
+RUN apk --update add openvpn transmission-daemon && rm -rf /var/cache/apk/*
+
 # create directories for downloaded files
 RUN mkdir -p /transmission/downloads
 RUN mkdir -p /transmission/incomplete