diff --git a/README.md b/README.md
index 93cb1f3..101be75 100644
--- a/README.md
+++ b/README.md
@@ -77,6 +77,7 @@ Override settings in `.rtorrent.rc`:
   - **MAX_UPLOADS** overrides `max_uploads`.
   - **DOWNLOAD_RATE** overrides `download_rate`.
   - **UPLOAD_RATE** overrides `upload_rate`.
+  - **PORT_RANGE** overrides `port_range` (*6801-6810*).
 
 ## Requirement
 
diff --git a/rootfs/usr/local/bin/docktorrent b/rootfs/usr/local/bin/docktorrent
index f17dcb9..d8ff672 100755
--- a/rootfs/usr/local/bin/docktorrent
+++ b/rootfs/usr/local/bin/docktorrent
@@ -31,6 +31,10 @@ chown -R www-data:www-data /rtorrent
     sed -i '/^upload_rate =/d' /root/.rtorrent.rc
     echo "upload_rate = ${UPLOAD_RATE}" >> /root/.rtorrent.rc
 }
+[ "${PORT_RANGE}" ] && {
+    sed -i '/^port_range =/d' /root/.rtorrent.rc
+    echo "port_range = ${PORT_RANGE}" >> /root/.rtorrent.rc
+}
 
 # Turn off all logs
 [ "${LOGS_OFF}" == "yes" ] || [ "${LOGS_OFF}" == "y" ] && {