diff --git a/Gemfile.lock b/Gemfile.lock
index a7a79b2..7885039 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -302,7 +302,7 @@ GEM
     rainbow (3.1.1)
     rake (13.3.1)
     rdiscount (2.2.7.3)
-    rdoc (6.15.0)
+    rdoc (6.15.1)
       erb
       psych (>= 4.0.0)
       tsort