diff --git a/lib/aozora2html/version.rb b/lib/aozora2html/version.rb
index faded71..9e7e84a 100644
--- a/lib/aozora2html/version.rb
+++ b/lib/aozora2html/version.rb
@@ -1,3 +1,3 @@
 class Aozora2Html
-  VERSION = "0.4.0"
+  VERSION = "0.5.0"
 end