diff --git a/cfg/09-file-options.vim b/cfg/09-file-options.vim
index 1b3841a..46842e5 100644
--- a/cfg/09-file-options.vim
+++ b/cfg/09-file-options.vim
@@ -2,3 +2,5 @@
 set undofile
 set swapfile
 set nobackup
+" Use blowfish2 to crypt files
+set cm=blowfish2