diff --git a/Gemfile.lock b/Gemfile.lock
index 2b23745..d03bef9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -75,7 +75,7 @@ GEM
     rainbow (3.1.1)
     rake (13.0.1)
     rchardet (1.8.0)
-    rdoc (6.3.3)
+    rdoc (6.3.4.1)
     regexp_parser (2.6.1)
     reline (0.3.3)
       io-console (~> 0.5)