diff --git a/NEWS.md b/NEWS.md
index 2917d80c80..82a871fbee 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -45,7 +45,7 @@ The following default gems are updated.
 * irb 1.12.0
 * net-http 0.4.1
 * prism 0.24.0
-* rdoc 6.6.3
+* rdoc 6.6.3.1
 * reline 0.5.0.pre.1
 * resolv 0.4.0
 * stringio 3.1.1