diff --git a/NEWS b/NEWS
index 9f9e162238..e091de82cc 100644
--- a/NEWS
+++ b/NEWS
@@ -159,6 +159,18 @@ with all sufficient information, see the ChangeLog file or Redmine
   * New constants:
     * Ripper::EXPR_BEG and so on for Ripper#state.
 
+* RDoc
+
+  * Update RDoc 6.0.0.beta3.
+    * Change lexer IRB based one to Ripper. It much improves the speed of generating document. 
+    * https://github.com/ruby/rdoc/pull/512
+
+* Rubygems
+
+  * Update Rubygems 2.6.14.
+    * http://blog.rubygems.org/2017/08/27/2.6.13-released.html
+    * http://blog.rubygems.org/2017/10/09/unsafe-object-deserialization-vulnerability.html
+
 * Set
   * Add Set#to_s as alias to #inspect [Feature #13676]
   * Add Set#=== as alias to #include? [Feature #13801]