diff --git a/README.md b/README.md
index 7a03ff0..1231aa7 100644
--- a/README.md
+++ b/README.md
@@ -41,15 +41,15 @@ The program is started from the command line. A few command line options are nec
 
 ### Update options
 -   -x      --extended             Extended updates (with SOG, COG, DPT)
--   -i      --interval=<NM>        Nautical miles between position updates (default 2). A value 0 means "arrival updates only"
+-   -i      --interval=\<NM\>        Nautical miles between position updates (default 2). A value 0 means "arrival updates only"
 
 ### Email options
--   -u      --user=<USERNAME>      Email account inlog user
--   -w      --password=<PASSWORD>  The password associated with the user account
--   -s      --server=<ADDRESS>     SMTP server
--   -p      --port=<PORT>          SMTP port (default 587)
--   -e      --email=<ADDRESS>      Source email address
--   -o      --override=<ADDRESS>   Override destination email address (default 'tracking@noforeignland.com')
+-   -u      --user=\<USERNAME\>      Email account inlog user
+-   -w      --password=<\PASSWORD\>  The password associated with the user account
+-   -s      --server=<\ADDRESS\>     SMTP server
+-   -p      --port=<\PORT\>          SMTP port (default 587)
+-   -e      --email=\<ADDRESS\>      Source email address
+-   -o      --override=\<ADDRESS\>   Override destination email address (default 'tracking@noforeignland.com')
 
 ### Example:
     perl nfl-apu.pl -t -g -i=2 -x -u=Frans -s=mail.fransveldman.nl -e=noreply@thefloatinglab.world 127.0.0.1:2947