diff --git a/lib/ougai/version.rb b/lib/ougai/version.rb
index 78edf72..f271c79 100644
--- a/lib/ougai/version.rb
+++ b/lib/ougai/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Ougai
-  VERSION = '1.7.1'
+  VERSION = '1.8.0'
 end