diff --git a/Gemfile.lock b/Gemfile.lock
index c8f5285..fd0e219 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -33,7 +33,7 @@ GEM
     nokogiri (1.10.8)
       mini_portile2 (~> 2.4.0)
     rake (12.3.3)
-    rdoc (6.2.0)
+    rdoc (6.3.2)
     rest-client (2.1.0)
       http-accept (>= 1.7.0, < 2.0)
       http-cookie (>= 1.0.2, < 2.0)