diff --git a/ChangeLog.md b/ChangeLog.md
index f0aa8b8..c058148 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,3 +1,7 @@
+## Release 1.2.2 - 2018/12/06
+
+* [fixed] Bundle update
+
 ## Release 1.2.1 - 2018/11/12
 
 * [fixed] Stop overwriting parameter type by `nil` [#278](https://github.com/fluent/fluentd-ui/pull/278) [#277](https://github.com/fluent/fluentd-ui/issues/277)
diff --git a/Gemfile.lock b/Gemfile.lock
index 05de330..9d0591b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    fluentd-ui (1.2.1)
+    fluentd-ui (1.2.2)
       addressable
       bootsnap (>= 1.1.0)
       bundler
diff --git a/lib/fluentd-ui/version.rb b/lib/fluentd-ui/version.rb
index 4d4315a..6d2add7 100644
--- a/lib/fluentd-ui/version.rb
+++ b/lib/fluentd-ui/version.rb
@@ -1,3 +1,3 @@
 module FluentdUI
-  VERSION = "1.2.1"
+  VERSION = "1.2.2"
 end