diff --git a/NEWS.md b/NEWS.md
index bb0778d511..ffd2c5845d 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -171,7 +171,7 @@ The following default gems are updated.
 * prettyprint 0.2.0
 * pstore 0.1.3
 * psych 5.1.1.1
-* rdoc 6.6.0
+* rdoc 6.6.1
 * reline 0.4.0
 * rinda 0.2.0
 * securerandom 0.3.0