diff --git a/lib/ougai/version.rb b/lib/ougai/version.rb
index a7291ee..391fc0e 100644
--- a/lib/ougai/version.rb
+++ b/lib/ougai/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Ougai
-  VERSION = '1.8.3'
+  VERSION = '1.8.4'
 end