diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8ae6bd3..5334909 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,11 @@
+<a name="0.9.1"></a>
+## 0.9.1
+
+### Features
+
+* 内部構造を改造した
+     * lib/t2hs.rbをUTF-8化した
+
 <a name="0.9.0"></a>
 ## 0.9.0
 
diff --git a/lib/aozora2html/version.rb b/lib/aozora2html/version.rb
index 381ed33..26144e4 100644
--- a/lib/aozora2html/version.rb
+++ b/lib/aozora2html/version.rb
@@ -1,3 +1,3 @@
 class Aozora2Html
-  VERSION = "0.9.0"
+  VERSION = "0.9.1"
 end