diff --git a/CHANGELOG b/CHANGELOG
deleted file mode 100644
index 3330239..0000000
--- a/CHANGELOG
+++ /dev/null
@@ -1,22 +0,0 @@
-*Optimism 3.3.0 (Aug 29, 2012)*
-
-	* add yaml,json support.
-	* you can write extensions to parser.
-
-	* change path. '_' is current path, '_r' is root path.
-	* change Optimism#_initilaize(:namespace) without move the node.
-	* rename 'MissingFile' -> 'EMissingFile'
-	* remove 'Optimism#_replace _walk!'
-	* remove 'Optimism.get', 'Optimsm.convert', 'Optimims.[]', 'Optimism#_get', 'Optimism#_child'
-	* remove 'hike' dependency
-	* add 'Optimism.require!', 'Optimism#_has_key2?'
-	* 'Optimism#initialize'  
-			- add (hash/optimism, o) argument.
-			- rename ':only_symbol_key' option to ':symbolize_key'
-			- add ':parser' option
-	* 'Optimism.require'
-			- support yaml file (.yml)
-			- rename ':mixin' option to ':merge'
-			- remove ':ignore_syntax_error', ':raise_missing_file' option
-	* 'Optimism#_walk' return nil instead of raising error
-	* 'Optimism#_store2' remove ':namespace' option
diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..d8dbfe8
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,29 @@
+## 3.3.0 - Aug 29, 2012
+
+### Improvements
+
+- Add yaml, json support. ([@GutenYe][])
+- You can write extensions to parser. ([@GutenYe][])
+- Remove `hike` dependency for less dependency. ([@Gutenye][])
+
+### Changes
+
+- Change path. `_` is current path, `_r` is root path.
+- Rename `Optimism::MissingFile` to `EMissingFile`
+- Remove `Optimism.get .convert .[]` `Optimsim#_get _child _replace _walk!`
+- Add `Optimism.require!`, `Optimism#_has_key2?`
+- `Optimism#initialize`  
+	- Add (hash/optimism, o) argument.
+	- Rename `:only_symbol_key` option to `:symbolize_key`
+	- Add `:parser` option
+	- `:namespace` option without move the node.
+- `Optimism.require`
+	- Support yaml file (.yml)
+	- Rename `:mixin` option to `:merge`
+	- Remove `:ignore_syntax_error`, `:raise_missing_file` option
+- `Optimism#_walk` return nil instead of raising error
+- `Optimism#_store2` remove `:namespace` option
+
+<!--- The following link definition list is generated by PimpMyChangelog --->
+[@GutenYe]: https://github.com/GutenYe
+[@Gutenye]: https://github.com/Gutenye
diff --git a/Gemfile b/Gemfile
index b74afdf..f5da49b 100644
--- a/Gemfile
+++ b/Gemfile
@@ -10,4 +10,5 @@ group :development do
   gem "rspec"
   gem "guard"
   gem "guard-rspec"
+  gem "pimpmychangelog"
 end