diff --git a/Gemfile.lock b/Gemfile.lock
index aa5afc3..8e211c9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -36,7 +36,7 @@ GEM
     racc (1.8.1)
     rainbow (3.1.1)
     rake (13.3.1)
-    rdoc (6.16.0)
+    rdoc (6.16.1)
       erb
       psych (>= 4.0.0)
       tsort