diff --git a/README.md b/README.md
index 1818b19..1028beb 100644
--- a/README.md
+++ b/README.md
@@ -9,9 +9,10 @@ An alternative to [z.sh](https://github.com/rupa/z) with windows and posix shell
 
 - **10x** times faster than **fasd** and **autojump**
 - **3x** times faster than **z.sh**
-- compatible with **posix shells**: bash, zsh, dash, sh, ash, busybox and etc.
+- available for **posix shells**: bash, zsh, dash, sh, ash, busybox and etc.
 - supports Windows cmd (with clink) and cmder
 - self contained, no dependence on awk/gawk
+- compatible with lua 5.1, 5.2 and 5.3+
 
 ## USE
 
diff --git a/z.lua b/z.lua
index 29e252d..7187484 100644
--- a/z.lua
+++ b/z.lua
@@ -4,12 +4,13 @@
 -- z.lua - z.sh implementation in lua, by skywind (2018/03/19)
 -- Licensed under MIT license.
 --
--- Version 30, Last Modified: 2018/04/03 17:49
+-- Version 31, Last Modified: 2018/11/23 00:36
 --
 -- * 10x times faster than fasd and autojump
 -- * 3x times faster than rupa/z
--- * compatible with posix shells: bash, zsh, sh, ash, dash, busybox
+-- * available for posix shells: bash, zsh, sh, ash, dash, busybox
 -- * supports windows
+-- * compatible with lua 5.1, 5.2 and 5.3+
 --
 -- USE:
 --     * z foo     # cd to most frecent dir matching foo