diff --git a/README b/README
index 6a8d814..8b132c5 100644
--- a/README
+++ b/README
@@ -3,8 +3,8 @@ ABOUT
                       target sites of CRISPR/CAS9 system by using seqmap
 
 VERSION
-         Version: 1.1
-         Dec 29, 2015
+         Version: 1.3
+         Apr 30, 2016
 
 SYNOPSIS
          $ perl ./offscan.pl <option>
@@ -62,6 +62,8 @@ Usage:
     -m  Memory size, default is 2048 [Mb (2Gb)]
     -f  Format reference sequence or not, can be 'true' [default] or 'false',
         critical if your FASTA file has annotation
+    -a  Path of seqman, default './bin/seqmap*'
+    -b  Map file, seqmap output
 
     For citation: