diff --git a/ChangeLog b/ChangeLog
index 2a1b9d8cce..140064d662 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Tue Dec 22 22:11:06 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
+
+	* NEWS: Added news entry of Psych 2.0.17
+
 Tue Dec 22 22:09:01 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
 
 	* NEWS: Added news entry of RDoc 4.2.1
diff --git a/NEWS b/NEWS
index 9cca7d92b0..19fab02df1 100644
--- a/NEWS
+++ b/NEWS
@@ -283,6 +283,9 @@ with all sufficient information, see the ChangeLog file.
   * Net::Telnet is extracted to net-telnet gem. It's unmaintain code.
     [Feature #11083]
 
+* Psych
+  * Updated to Psych 2.0.17
+
 * Rake
   * Rake is removed from stdlib.  [Feature #11025]