diff --git a/openwrt/viwib-1-firmware-upgrade.sh b/openwrt/viwib-1-firmware-upgrade.sh
index 3bbcf45..57ddc70 100755
--- a/openwrt/viwib-1-firmware-upgrade.sh
+++ b/openwrt/viwib-1-firmware-upgrade.sh
@@ -4,7 +4,7 @@
 
 if [ $# -ne 1 ]; then
     echo "$0 address"
-    echo "    address: connect to this address, ignore the interface"
+    echo "    address: connect to this address (default: 192.168.8.1)"
     exit 1
 fi
 
@@ -13,8 +13,8 @@ set -x
 viwib_ip=$1; shift
 
 # openwrt
-version=19.07.8
-filename=openwrt-${version}-ramips-mt76x8-gl-mt300n-v2-squashfs-sysupgrade.bin
+version=21.02.1
+filename=openwrt-${version}-ramips-mt76x8-glinet_gl-mt300n-v2-squashfs-sysupgrade.bin
 
 # don't care about other/old known_host entries
 ssh-keygen  -R ${viwib_ip}