diff --git a/openwrt/viwib-1-firmware-upgrade.sh b/openwrt/viwib-1-firmware-upgrade.sh
index 0d67ab3..45e550e 100755
--- a/openwrt/viwib-1-firmware-upgrade.sh
+++ b/openwrt/viwib-1-firmware-upgrade.sh
@@ -42,7 +42,7 @@ ssh root@${viwib_ip} "sysupgrade -n /tmp/*.bin"
 
 # It still pings for some time - wait for the reboot to happen
 echo "Waiting for viwib to really disappear"
-sleep 15
+sleep 30
 
 wait=0
 found=""