diff --git a/ChangeLog b/ChangeLog
index 48e809178d1e0d..f0da9270da6580 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Tue Dec 22 20:25:33 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
+
+	* ext/psych/lib/psych.rb: bump version to 2.0.17
+	* ext/psych/psych.gemspec: ditto.
+
 Tue Dec 22 20:14:47 2015  Koichi Sasada  <ko1@atdot.net>
 
 	* vm_insnhelper.c: move vm_callee_setup_block_arg() (and related
diff --git a/ext/psych/lib/psych.rb b/ext/psych/lib/psych.rb
index 83b5dbba298c91..f442e544ce31a5 100644
--- a/ext/psych/lib/psych.rb
+++ b/ext/psych/lib/psych.rb
@@ -224,7 +224,7 @@
 
 module Psych
   # The version is Psych you're using
-  VERSION         = '2.0.16'
+  VERSION         = '2.0.17'
 
   # The version of libyaml Psych is using
   LIBYAML_VERSION = Psych.libyaml_version.join '.'
diff --git a/ext/psych/psych.gemspec b/ext/psych/psych.gemspec
index 42a8dd3d4e7fb9..70ac510f5594d8 100644
--- a/ext/psych/psych.gemspec
+++ b/ext/psych/psych.gemspec
@@ -1,10 +1,10 @@
 # -*- encoding: utf-8 -*-
-# stub: psych 2.0.16 ruby lib
+# stub: psych 2.0.17 ruby lib
 # stub: ext/psych/extconf.rb
 
 Gem::Specification.new do |s|
   s.name = "psych"
-  s.version = "2.0.16"
+  s.version = "2.0.17"
 
   s.required_rubygems_version = Gem::Requirement.new(">= 0") if s.respond_to? :required_rubygems_version=
   s.require_paths = ["lib"]