diff --git a/ext/io/console/io-console.gemspec b/ext/io/console/io-console.gemspec
index 40f4c6c543..814bd4ef7d 100644
--- a/ext/io/console/io-console.gemspec
+++ b/ext/io/console/io-console.gemspec
@@ -1,5 +1,5 @@
 # -*- ruby -*-
-_VERSION = "0.5.5"
+_VERSION = "0.5.6"
 date = %w$Date::                           $[1]
 
 Gem::Specification.new do |s|