diff --git a/board/czechlight/clearfog/usb-genimage.cfg b/board/czechlight/clearfog/usb-genimage.cfg
index d909262..50c4fec 100644
--- a/board/czechlight/clearfog/usb-genimage.cfg
+++ b/board/czechlight/clearfog/usb-genimage.cfg
@@ -10,7 +10,7 @@
 			"usb-reflash-factory.sh"
 		}
 	}
-	size = 128M
+	size = 256M
 }
 
 image usb-flash.img {