diff --git a/Gemfile b/Gemfile
index 317ec76..66742d0 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,7 +4,7 @@ gem "licensee", ">= 9.9.0"
 gem "github-linguist", ">= 7.12.1"
 gem "commonmarker", "~> 0.23.10"
 gem "RedCloth", "~> 4.3"
-gem "rdoc", "6.3.1"
+gem "rdoc", "6.3.4.1"
 gem "org-ruby", "~> 0.9.12"
 gem "creole", "~> 0.5.0"
 gem "wikicloth", "~> 0.8.3"
diff --git a/Gemfile.lock b/Gemfile.lock
index b620b86..edc6629 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -44,7 +44,7 @@ GEM
       rubypants (~> 0.2)
     public_suffix (4.0.6)
     racc (1.6.2)
-    rdoc (6.3.1)
+    rdoc (6.3.4.1)
     reverse_markdown (1.4.0)
       nokogiri
     ruby2_keywords (0.0.4)
@@ -79,7 +79,7 @@ DEPENDENCIES
   github-markup (~> 4.0)
   licensee (>= 9.9.0)
   org-ruby (~> 0.9.12)
-  rdoc (= 6.3.1)
+  rdoc (= 6.3.4.1)
   wikicloth (~> 0.8.3)
 
 BUNDLED WITH