diff --git a/Gemfile.lock b/Gemfile.lock
index 5f760b62..3d2cd6c6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -216,7 +216,7 @@ GEM
       zeitwerk (~> 2.6)
     rainbow (3.1.1)
     rake (13.1.0)
-    rdoc (6.5.0)
+    rdoc (6.6.0)
       psych (>= 4.0.0)
     regexp_parser (2.8.2)
     reline (0.3.9)