diff --git a/NEWS b/NEWS
index ad2fb2f3a3..5fbf081fa6 100644
--- a/NEWS
+++ b/NEWS
@@ -56,6 +56,10 @@ CSV::
   * Upgrade to 3.0.4.
     See https://github.com/ruby/csv/blob/master/NEWS.md.
 
+ERB::
+
+  * Prohibit marshabling ERB instance.
+
 RSS::
 
   * Upgrade to RSS 0.2.8.