diff --git a/bsp/board_mt7621.bsp b/bsp/board_mt7621.bsp
index 340ec0b..1c91bf5 100644
--- a/bsp/board_mt7621.bsp
+++ b/bsp/board_mt7621.bsp
@@ -3,6 +3,6 @@ chipset=ramips
 subtarget=mt7621
 
 images=(
-        "openwrt-ramips-mt7621-ubnt-erx-squashfs-sysupgrade.tar"
-        "openwrt-ramips-mt7621-ubnt-erx-sfp-squashfs-sysupgrade.tar"
+        "openwrt-ramips-mt7621-ubnt-erx-squashfs-sysupgrade.bin"
+        "openwrt-ramips-mt7621-ubnt-erx-sfp-squashfs-sysupgrade.bin"
        )