diff --git a/update.sh b/update.sh
index 0554b44..b159b22 100755
--- a/update.sh
+++ b/update.sh
@@ -1,3 +1,7 @@
-#!/bin/sh -xe
+#!/usr/bin/env sh
+set -x -e
+
+git checkout main
 git pull
-exec docker-compose up -d --build
+
+docker-compose up -d --build