diff --git a/lib/un.gemspec b/lib/un.gemspec
index de8e6ec312..1a466fdebe 100644
--- a/lib/un.gemspec
+++ b/lib/un.gemspec
@@ -2,7 +2,7 @@
 
 Gem::Specification.new do |spec|
   spec.name          = "un"
-  spec.version       = "0.2.0"
+  spec.version       = "0.2.1"
   spec.authors       = ["WATANABE Hirofumi"]
   spec.email         = ["eban@ruby-lang.org"]