diff --git a/CHANGELOG.md b/CHANGELOG.md
index 334d47e..2b8e2d1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.2.2 - 2016-01-21
+
+- Changed the threshold of batch size for uploading emails as a request [#9](https://github.com/treasure-data/embulk-output-mailchimp/pull/9)
+
 ## 0.2.1 - 2016-01-06
 
 - Logging API request/response [#5](https://github.com/treasure-data/embulk-output-mailchimp/pull/5)
diff --git a/embulk-output-mailchimp.gemspec b/embulk-output-mailchimp.gemspec
index 9967171..a47d3be 100644
--- a/embulk-output-mailchimp.gemspec
+++ b/embulk-output-mailchimp.gemspec
@@ -1,7 +1,7 @@
 
 Gem::Specification.new do |spec|
   spec.name          = "embulk-output-mailchimp"
-  spec.version       = "0.2.1"
+  spec.version       = "0.2.2"
   spec.authors       = ["uu59", "takkanm"]
   spec.summary       = "Mailchimp output plugin for Embulk"
   spec.description   = "Dumps records to Mailchimp."