diff --git a/Gemfile.lock b/Gemfile.lock
index afe17ef3..bf91464f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -104,7 +104,7 @@ GEM
       thor (~> 1.0, >= 1.2.2)
       zeitwerk (~> 2.6)
     rake (13.2.1)
-    rdoc (6.8.1)
+    rdoc (6.9.0)
       psych (>= 4.0.0)
     reline (0.5.12)
       io-console (~> 0.5)