diff --git a/readme.txt b/readme.txt
index ac6b16f..5d30d11 100644
--- a/readme.txt
+++ b/readme.txt
@@ -2,7 +2,7 @@
 
                     Mugen sound extractor by Popov Evgeniy Alekseyevich
 
-                             Version 2.3.1
+                             Version 2.3.1.0.1
 
 
 System requirement
@@ -11,7 +11,7 @@ System requirement
 
 Description and usage
 
-This program is created for extract a sounds from games that built on MUGEN game engine.
+This program is created for extract a sound from games that built on MUGEN game engine.
 This program takes a target file name as command line argument. 
 
 Exit codes
@@ -32,15 +32,15 @@ But you can do it under any modern C compiler.
 Source code can be compiled for wide range operation systems, but you need create makefile or build script by yourself.
 I provide only two things: compiled binary file for Windows and makefile for Linux.
 
-Installation and uninstallation under Linux
+Install and uninstall under Linux
 
 Follow this steps:
 
 1.Extract content of source code archive.
 2.Open terminal and go to source code directory.
 3.
-Run for installation: make install
-Run for uninstallation: make uninstall
+Run for install: make install
+Run for uninstall: make uninstall
 
 Contact
 
@@ -48,10 +48,11 @@ You can send me a letter to tuzik87@inbox.ru.
 
 Version history
 
-1.0 — 1.9.2.5 — Internal unstable build.
-1.9.2.6 — First stable version.
-1.9.2.7 — First public version.
-1.9.2.8 — Experimental build.
-1.9.2.9 — 2.2.3 - Stable branch builds.
+1.0 — 1.9.2.5 — Internal unstable build.
+1.9.2.6 — First stable version.
+1.9.2.7 — First public version.
+1.9.2.8 — Experimental build.
+1.9.2.9 — 2.2.3 - Stable branch builds.
 2.2.4 - 2.3 - Small changes.
 2.3.1 - Source code was improved. Linux support has been added.
+2.3.1.0.1 – Documentation was updated.
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