diff --git a/CHANGELOG.md b/CHANGELOG.md
index e1e2bdae..a3c6868b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,7 +1,10 @@
 # Change Log
 All notable changes to this project will be documented in this file.
 
-## v1.0.0 - UNRELEASED
+## v1.0.1 - UNRELEASED
+Nothing yet.
+
+## v1.0.0 - 2016-02-07
 ### Changed
 - Remove support for running on PHP5.3 and PHP5.4 machines
 - [#10: Not conpatible with nikic/php-parser v2.0.0](https://github.com/mamuz/PhpDependencyAnalysis/issues/10)
diff --git a/README.md b/README.md
index 4fde303a..cab18a0e 100644
--- a/README.md
+++ b/README.md
@@ -40,11 +40,16 @@ After installing [`GraphViz`](http://www.graphviz.org/) the recommended way to i
 ```json
 {
     "require-dev": {
-        "mamuz/php-dependency-analysis": "0.*"
+        "mamuz/php-dependency-analysis": "1.*"
     }
 }
 ```
 
+### PHP-Version
+
+To run the newest version of this tool, it requires PHP >= 5.5. 
+For running on machines with PHP < 5.5 have a look to 0.* releases.
+
 ## Features
 
 - Providing high customizing level
diff --git a/src/Command/MessageInterface.php b/src/Command/MessageInterface.php
index be65cefa..0a266956 100644
--- a/src/Command/MessageInterface.php
+++ b/src/Command/MessageInterface.php
@@ -27,7 +27,7 @@
 
 interface MessageInterface
 {
-    const VERSION = 'dev-master';
+    const VERSION = 'v1.0.0';
 
     const NAME = 'PhpDependencyAnalysis by Marco Muths';