diff --git a/buildroot-external/rootfs-overlay/usr/sbin/hassos-config b/buildroot-external/rootfs-overlay/usr/sbin/hassos-config
index 7531216ac..7b5bdd3ce 100755
--- a/buildroot-external/rootfs-overlay/usr/sbin/hassos-config
+++ b/buildroot-external/rootfs-overlay/usr/sbin/hassos-config
@@ -41,10 +41,10 @@ fi
 
 ##
 # Firmware update
-if ls /mnt/config/*.rauc > /dev/null; then
+if ls /mnt/config/*.raucb > /dev/null; then
     echo "[Info] Performe a firmware update"
 
-    rauc_filename=$(ls /mnt/config/*.rauc | head -n 1)
+    rauc_filename=$(ls /mnt/config/*.raucb | head -n 1)
     rauc install /mnt/config/$rauc_filename
 fi