diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3b4f653..8fc291f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
-## [UNRELEASED] - UNRELEASED
+## [1.0.0] - 2015-09-02
 ### Added
-- Release the first major version of this mapping.
+- The first major, fully functionnal, version of this script. That's pretty much everything.
+  The `README.md` viewed at the stage of this tag is a good place to look at if you want to
+  have a look at the initial state of this project.