diff --git a/start.sh b/start.sh
index 5d13c45..63182c5 100755
--- a/start.sh
+++ b/start.sh
@@ -12,6 +12,10 @@ if [ ! -z "$ANTOS_USER" ]; then
     adduser --home "/home/$ANTOS_USER" --disabled-password --gecos "" "$ANTOS_USER"
     echo "$ANTOS_USER:$ANTOS_PASSWORD" | /bin/chpasswd
 fi
+
+unset ANTOS_USER
+unset ANTOS_PASSWORD
+
 # start antd-tunnel service
 [ ! -f "/app/antd-config.ini" ] && cp /opt/www/antd-config.ini /app/antd-config.ini
 [ ! -f "/app/runner.ini" ] && cp /opt/www/runner.ini /app/runner.ini