diff --git a/README.org b/README.org
index 752e60b..d7e5148 100644
--- a/README.org
+++ b/README.org
@@ -719,6 +719,8 @@ variable in section are compatible.  The local variable ~compile-command~ in the
 #+caption: Tangle the Latexmk resource file.
 #+name: lst:latexmkrc
 #+begin_src perl :tangle latexmkrc :comments none
+  # pdf creator
+  $pdf_mode = 4;  # 4 means lualatex
   # pdf previewer and update pdf previewer
   $pdf_previewer = "emacsclient -e '(find-file-other-window %S)'";
   $pdf_update_method = 4;  # 4 runs a command to force the update
@@ -726,7 +728,7 @@ variable in section are compatible.  The local variable ~compile-command~ in the
   # see for instance glossary.latexmkrc
   add_cus_dep( 'acn', 'acr', 0, 'makeglossaries' );
   add_cus_dep( 'glo', 'gls', 0, 'makeglossaries' );
-  $clean_ext .= " acr acn alg bbl glo gls glg ist lol run.xml";
+  $clean_ext .= " acr acn alg bbl dvi glo gls glg ist lol nav run.xml snm synctex.gz";
   sub makeglossaries {
       my ($name, $path) = fileparse( $$Psource );
       return system "makeglossaries -d '$path' '$name'";