diff --git a/main.sh b/main.sh
index 0cc837f..b03bc36 100644
--- a/main.sh
+++ b/main.sh
@@ -89,7 +89,7 @@ do_partition() {
 	start=1
 	if [ "$EFI" == "1" ]; then
 		parted -a optimal $TARGET_PHY_ID -s -- mklabel gpt
-		size=500
+		size=512
 		parted -a optimal $TARGET_PHY_ID unit mib -s -- mkpart EFI fat32 $start $(( start + size ))
 		sleep 2
 		start=$(( start + size ))