diff --git a/README.md b/README.md
index 4c24460..acc576c 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 ### Description ###
 
-AVR-ASM-Sublime is [avr](http://atmel.com/) assembler syntax definition for [Sublime Text 2](http://www.sublimetext.com/) editor. Support both ASM v1.0 and ASM v2.0 constructions.
+AVR-ASM-Sublime provides [avr](http://atmel.com/) assembler syntax definitions for [Sublime Text 3](http://www.sublimetext.com/) editor. It supports both ASM v1.0 and ASM v2.0 constructions.
 
 ### Repository Content ###
 
@@ -14,11 +14,17 @@ AVR-ASM-Sublime is [avr](http://atmel.com/) assembler syntax definition for [Sub
 
 There are three ways to install this syntax definition.
    
-1. Simplest way. Download repository content to your local disk and copy folder `AVR-ASM-Sublime` (renamed) to Sublime [packages directory](http://sublimetext.info/docs/en/basic_concepts.html#the-packages-directory).
-2. Another simplest way. `cd ~/.config/sublime-text-2/packages && git clone git://github.com/voventus/AVR-ASM-Sublime.git`
-3. Preferred way. Install this syntax definition through [package control](http://wbond.net/sublime_packages/package_control): Preferences ► Package Control ► Install Package ► AVR-ASM-Sublime
+  1. Package Control:  
+     Install this syntax definition through [package control](http://wbond.net/sublime_packages/package_control): Preferences ► Package Control ► Install Package ► AVR-ASM-Sublime
+
+  2. Manual Download:  
+     Download the repository content to your local disk and copy folder `AVR-ASM-Sublime` (renamed) to Sublime [packages directory](http://sublimetext.info/docs/en/basic_concepts.html#the-packages-directory).
+
+  3. Git cloning:  
+     `cd ~/.config/sublime-text-2/packages && git clone git://github.com/voventus/AVR-ASM-Sublime.git`
 
 Restart Sublime if needed.
 
 ### Usage ###
+
 As usual: View ► Syntax ► AVR ASM
\ No newline at end of file
diff --git a/avr-asm.JSON-tmLanguage b/avr-asm.JSON-tmLanguage
index db18fc4..0a726df 100644
--- a/avr-asm.JSON-tmLanguage
+++ b/avr-asm.JSON-tmLanguage
@@ -1,7 +1,7 @@
 {
     "name": "AVR ASM",
     "scopeName": "source.asm",
-    "fileTypes": ["asm", "inc"],
+    "fileTypes": ["asm", "inc", "S", "s"],
     "patterns": [
 
         {
diff --git a/avr-asm.tmLanguage b/avr-asm.tmLanguage
index b874320..53729d3 100644
--- a/avr-asm.tmLanguage
+++ b/avr-asm.tmLanguage
@@ -6,6 +6,8 @@
 	<array>
 		<string>asm</string>
 		<string>inc</string>
+		<string>S</string>
+		<string>s</string>
 	</array>
 	<key>name</key>
 	<string>AVR ASM</string>