diff --git a/ChangeLog b/ChangeLog
index f0c33ec..8bffd0a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,6 @@
+Release 0.3.11 - 2014/12/19
+* [improve] Save config history. Now any saved config files can be restored to the current.
+
 Release 0.3.10 - 2014/12/17
 * [maintenance] Update components.
 * [improve] Add fluentd default plugin settings.
diff --git a/Gemfile.lock b/Gemfile.lock
index 93b502b..7270c17 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    fluentd-ui (0.3.10)
+    fluentd-ui (0.3.11)
       addressable
       bundler
       draper (~> 1.3)
diff --git a/lib/fluentd-ui/version.rb b/lib/fluentd-ui/version.rb
index fe4b623..d67e3a6 100644
--- a/lib/fluentd-ui/version.rb
+++ b/lib/fluentd-ui/version.rb
@@ -1,3 +1,3 @@
 module FluentdUI
-  VERSION = "0.3.10"
+  VERSION = "0.3.11"
 end