diff --git a/Dockerfile b/Dockerfile
index 75b9530..6de5499 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,11 +1,16 @@
 FROM ubuntu:latest
 LABEL version="1.1" maintainer="John Stucklen <stuckj@gmail.com>"
 
+ARG DL_BASE_URL=https://s3-eu-west-1.amazonaws.com/subsonic-public/download
+ARG DL_VERSION=6.1.6
+ARG DL_SHA256=dfb78fa9bb38f2265f498122846b1d6121f7666035a78dbe3a24305bd16c18a0
+
 ENV LC_ALL en_US.UTF-8
 ENV LANG en_US.UTF-8
 ENV LANGUAGE en_US:en
 ENV SUBSONIC_UID 1000
 ENV SUBSONIC_GID 1000
+ENV SUBSONIC_VERSION $DL_VERSION
 
 RUN export DEBIAN_FRONTEND=noninteractive \
   && apt-get update \
@@ -19,9 +24,10 @@ RUN sed -i -e 's/# en_US.UTF-8 UTF-8/en_US.UTF-8 UTF-8/' /etc/locale.gen \
   && localedef -i en_US -c -f UTF-8 -A /usr/share/locale/locale.alias en_US.UTF-8
 
 RUN mkdir -p /opt/subsonic \
-  && wget --no-check-certificate https://s3-eu-west-1.amazonaws.com/subsonic-public/download/subsonic-6.1.6-standalone.tar.gz \
-  && tar xvzf subsonic-6.1.6-standalone.tar.gz -C /opt/subsonic \
-  && rm -rf subsonic-6.1.6-standalone.tar.gz
+  && wget --no-check-certificate $DL_BASE_URL/subsonic-$DL_VERSION-standalone.tar.gz \
+  && echo $DL_SHA256 *subsonic-$DL_VERSION-standalone.tar.gz | sha256sum -c - \
+  && tar xvzf subsonic-$DL_VERSION-standalone.tar.gz -C /opt/subsonic \
+  && rm -rf subsonic-$DL_VERSION-standalone.tar.gz
 
 COPY mikmod_stdout /opt/subsonic
 COPY timidity_stdout /opt/subsonic