diff --git a/Dockerfile b/Dockerfile
index 6ce3026..07f46c0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,7 @@
 FROM alpine:latest
 
+ENV TORRENTLIST=https://raw.githubusercontent.com/ngosang/trackerslist/master/trackers_all.txt
+
 COPY ./tracker-add-auto.sh /opt/tracker-add-auto.sh
 
 RUN apk add --update \
diff --git a/tracker-add-auto.sh b/tracker-add-auto.sh
index 9929724..513738b 100644
--- a/tracker-add-auto.sh
+++ b/tracker-add-auto.sh
@@ -5,7 +5,7 @@ sleep 25
 add_trackers () {
     torrent_hash=$1
     id=$2
-for base_url in https://raw.githubusercontent.com/ngosang/trackerslist/master/trackers_all.txt ; do
+for base_url in "$TORRENTLIST" ; do
     echo "URL for ${base_url}"
     echo "Adding trackers for $torrent_name..."
 for tracker in $(curl -# "${base_url}") ; do