diff --git a/Gemfile.lock b/Gemfile.lock
index 35f2ef7..6fc339b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -26,7 +26,7 @@ GEM
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rake (13.0.3)
-    rdoc (6.3.2)
+    rdoc (6.3.4.1)
     rest-client (2.1.0)
       http-accept (>= 1.7.0, < 2.0)
       http-cookie (>= 1.0.2, < 2.0)