diff --git a/Diff.php b/Diff.php
index dfd0403..b714cde 100644
--- a/Diff.php
+++ b/Diff.php
@@ -5,7 +5,7 @@
 	return 1;
 }
 
-define( 'Diff_VERSION', '1.0 alpha' );
+define( 'Diff_VERSION', '1.0' );
 
 if ( defined( 'MEDIAWIKI' ) ) {
 	call_user_func( function() {
diff --git a/README.md b/README.md
index 94ff77d..151a8e3 100644
--- a/README.md
+++ b/README.md
@@ -17,7 +17,7 @@ On Packagist:
 
 ## Requirements
 
-* PHP 5.3 or later
+* PHP 5.3 or later (tested with PHP 5.3 up to PHP 5.6 and hhvm)
 
 ## Installation
 
diff --git a/RELEASE-NOTES.md b/RELEASE-NOTES.md
index 8a3d801..26c7352 100644
--- a/RELEASE-NOTES.md
+++ b/RELEASE-NOTES.md
@@ -3,7 +3,7 @@ These are the release notes for the [Diff library](README.md).
 Latest release:
 [![Latest Stable Version](https://poser.pugx.org/diff/diff/version.png)](https://packagist.org/packages/diff/diff)
 
-## Version 1.0 (dev)
+## Version 1.0 (2014-04-10)
 
 #### Improvements