diff --git a/Gemfile.lock b/Gemfile.lock
index 7775a85..8109d01 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -367,7 +367,7 @@ GEM
     rainbow (3.1.1)
     rake (13.1.0)
     rchardet (1.8.0)
-    rdoc (6.6.2)
+    rdoc (6.6.3.1)
       psych (>= 4.0.0)
     redis (5.1.0)
       redis-client (>= 0.17.0)