diff --git a/debian/changelog b/debian/changelog
index d756a30..8d58551 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,17 @@
+systemback (1.9.4hamonikr9) jin; urgency=low
+
+  * Update systemback/systemback.cpp
+   - Fix #7 : Support isohybrid UEFI support
+
+ -- HamoniKR <pkg@hamonikr.org>  Mon, 19 Apr 2021 16:26:12 +0900
+
+systemback (1.9.4hamonikr8) jin; urgency=low
+
+  * Update systemback/systemback.cpp
+   - genisoimage option change 
+
+ -- HamoniKR <pkg@hamonikr.org>  Mon, 19 Apr 2021 09:51:06 +0900
+
 systemback (1.9.4hamonikr7) jin; urgency=low
 
   * Update systemback/systemback.cpp
diff --git a/systemback/systemback.cpp b/systemback/systemback.cpp
index f316728..601b660 100644
--- a/systemback/systemback.cpp
+++ b/systemback/systemback.cpp
@@ -7469,7 +7469,9 @@ void systemback::on_livenew_clicked()
             if(! (sb::rename(sb::sdir[2] % "/.sblivesystemcreate/syslinux/syslinux.cfg", sb::sdir[2] % "/.sblivesystemcreate/syslinux/isolinux.cfg") && sb::rename(sb::sdir[2] % "/.sblivesystemcreate/syslinux", sb::sdir[2] % "/.sblivesystemcreate/isolinux")) || intrrpt) return err();
             ui->progressbar->setValue(0);
 
-            if(sb::exec("genisoimage -iso-level 3 -allow-limited-size -r -V H-LIVE -cache-inodes -J -l -b isolinux/isolinux.bin -no-emul-boot -boot-load-size 4 -boot-info-table -c isolinux/boot.cat -o \"" % sb::sdir[2] % "\"/" % ifname % ".iso \"" % sb::sdir[2] % "\"/.sblivesystemcreate", sb::Prgrss))
+            // if(sb::exec("genisoimage -r -V H-LIVE -cache-inodes -J -l -b isolinux/isolinux.bin -no-emul-boot -boot-load-size 4 -boot-info-table -c isolinux/boot.cat -o \"" % sb::sdir[2] % "\"/" % ifname % ".iso \"" % sb::sdir[2] % "\"/.sblivesystemcreate", sb::Prgrss))
+
+            if(sb::exec("genisoimage -r -V H-LIVE -cache-inodes -J -l -b isolinux/isolinux.bin -no-emul-boot -boot-load-size 4 -boot-info-table -c isolinux/boot.cat -eltorito-alt-boot -e boot/grub/efi.img -no-emul-boot -o \"" % sb::sdir[2] % "\"/" % ifname % ".iso \"" % sb::sdir[2] % "\"/.sblivesystemcreate", sb::Prgrss))            
             {
                 if(sb::isfile(sb::sdir[2] % '/' % ifname % ".iso")) sb::remove(sb::sdir[2] % '/' % ifname % ".iso");
                 return err(312);
@@ -7507,7 +7509,8 @@ void systemback::on_liveconvert_clicked()
     pset(21, " 2/2"),
     sb::Progress = -1,
     ui->progressbar->setValue(0);
-    if(sb::exec("genisoimage -iso-level 3 -allow-limited-size -r -V H-LIVE -cache-inodes -J -l -b isolinux/isolinux.bin -no-emul-boot -boot-load-size 4 -boot-info-table -c isolinux/boot.cat -o \"" % path % "\".iso \"" % sb::sdir[2] % "\"/.sblivesystemconvert", sb::Prgrss)) return err(325);
+    // if(sb::exec("genisoimage -r -V H-LIVE -cache-inodes -J -l -b isolinux/isolinux.bin -no-emul-boot -boot-load-size 4 -boot-info-table -c isolinux/boot.cat -o \"" % path % "\".iso \"" % sb::sdir[2] % "\"/.sblivesystemconvert", sb::Prgrss)) return err(325);
+    if(sb::exec("genisoimage -r -V H-LIVE -cache-inodes -J -l -b isolinux/isolinux.bin -no-emul-boot -boot-load-size 4 -boot-info-table -c isolinux/boot.cat -eltorito-alt-boot -e boot/grub/efi.img -no-emul-boot -o \"" % path % "\".iso \"" % sb::sdir[2] % "\"/.sblivesystemconvert", sb::Prgrss)) return err(325);
     if(sb::exec("isohybrid \"" % path % "\".iso") || ! cfmod(path % ".iso", 0666)) return err();
     sb::remove(sb::sdir[2] % "/.sblivesystemconvert");
     if(intrrpt) return err();