diff --git a/Gemfile b/Gemfile
index 1bdcfdf..853f952 100644
--- a/Gemfile
+++ b/Gemfile
@@ -6,7 +6,7 @@ gem 'haml'
 gem 'github-markup'
 gem 'redcarpet'
 gem 'RedCloth'
-gem 'rdoc', '3.6.1'
+gem 'rdoc', '6.2.0'
 gem 'org-ruby'
 gem 'creole'
 gem 'wikicloth'
diff --git a/Gemfile.lock b/Gemfile.lock
index 6a030be..f73c13d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -45,7 +45,7 @@ GEM
     rack-test (0.6.3)
       rack (>= 1.0)
     rake (12.0.0)
-    rdoc (3.6.1)
+    rdoc (6.2.0)
     redcarpet (3.4.0)
     rspec (3.5.0)
       rspec-core (~> 3.5.0)
@@ -105,7 +105,7 @@ DEPENDENCIES
   org-ruby
   poltergeist
   rake
-  rdoc (= 3.6.1)
+  rdoc (= 6.2.0)
   redcarpet
   rspec
   simplecov