diff --git a/Gemfile.lock b/Gemfile.lock
index f274b55..d80fcbf 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -56,7 +56,7 @@ GEM
       pry (~> 0.9)
       slop (~> 3.0)
     rake (13.0.1)
-    rdoc (5.1.0)
+    rdoc (6.3.2)
     rest-client (2.0.2)
       http-cookie (>= 1.0.2, < 2.0)
       mime-types (>= 1.16, < 4.0)