diff --git a/ChangeLog b/ChangeLog
index 23008655d1..56e8f78baf 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Fri Oct 31 16:47:35 2014  Akinori MUSHA  <knu@iDaemons.org>
+
+	* ext/syslog/lib/syslog/logger.rb (Syslog::Logger::VERSION): Bump
+	  the VERSION to 2.1.0. [ruby-core:64483] [Bug #10159]
+
 Fri Oct 31 16:33:46 2014  Akinori MUSHA  <knu@iDaemons.org>
 
 	* lib/net/imap.rb (Net::IMAP#fetch): [DOC] Document that
diff --git a/ext/syslog/lib/syslog/logger.rb b/ext/syslog/lib/syslog/logger.rb
index 086f83c591..7040e19d3d 100644
--- a/ext/syslog/lib/syslog/logger.rb
+++ b/ext/syslog/lib/syslog/logger.rb
@@ -66,7 +66,7 @@ class Syslog::Logger
   ##
   # The version of Syslog::Logger you are using.
 
-  VERSION = '2.0'
+  VERSION = '2.1.0'
 
   ##
   # Maps Logger warning types to syslog(3) warning types.