diff --git a/Gemfile b/Gemfile
index 7fdaf18..190163b 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,7 +5,7 @@ source "http://rubygems.org"
 # Development dependencies
 group :development do
   gem "rspec", "~> 2.8.0"
-  gem "rdoc", "~> 3.12"
+  gem "rdoc", "~> 6.3"
   gem "bundler", "~> 1.1.0"
   gem "jeweler", "~> 1.8.4"
   gem "simplecov", "~> 0.6.4"
diff --git a/Gemfile.lock b/Gemfile.lock
index ec8b585..6dba368 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -9,7 +9,6 @@ GEM
       git (>= 1.2.5)
       rake
       rdoc
-    json (1.7.4)
     method_source (0.8)
     multi_json (1.3.6)
     pry (0.9.10)
@@ -17,8 +16,7 @@ GEM
       method_source (~> 0.8)
       slop (~> 3.3.1)
     rake (0.9.2.2)
-    rdoc (3.12)
-      json (~> 1.4)
+    rdoc (6.3.1)
     rspec (2.8.0)
       rspec-core (~> 2.8.0)
       rspec-expectations (~> 2.8.0)
@@ -41,7 +39,7 @@ DEPENDENCIES
   bundler (~> 1.1.0)
   jeweler (~> 1.8.4)
   pry
-  rdoc (~> 3.12)
+  rdoc (~> 6.3)
   rspec (~> 2.8.0)
   simplecov (~> 0.6.4)
   spork (~> 0.9.2)
diff --git a/sylvester.gemspec b/sylvester.gemspec
index 606933a..8d704ab 100644
--- a/sylvester.gemspec
+++ b/sylvester.gemspec
@@ -53,7 +53,7 @@ Gem::Specification.new do |s|
 
     if Gem::Version.new(Gem::VERSION) >= Gem::Version.new('1.2.0') then
       s.add_development_dependency(%q<rspec>, ["~> 2.8.0"])
-      s.add_development_dependency(%q<rdoc>, ["~> 3.12"])
+      s.add_development_dependency(%q<rdoc>, "~> 6.3")
       s.add_development_dependency(%q<bundler>, ["~> 1.1.0"])
       s.add_development_dependency(%q<jeweler>, ["~> 1.8.4"])
       s.add_development_dependency(%q<simplecov>, ["~> 0.6.4"])
@@ -61,7 +61,7 @@ Gem::Specification.new do |s|
       s.add_development_dependency(%q<pry>, [">= 0"])
     else
       s.add_dependency(%q<rspec>, ["~> 2.8.0"])
-      s.add_dependency(%q<rdoc>, ["~> 3.12"])
+      s.add_dependency(%q<rdoc>, "~> 6.3")
       s.add_dependency(%q<bundler>, ["~> 1.1.0"])
       s.add_dependency(%q<jeweler>, ["~> 1.8.4"])
       s.add_dependency(%q<simplecov>, ["~> 0.6.4"])
@@ -70,7 +70,7 @@ Gem::Specification.new do |s|
     end
   else
     s.add_dependency(%q<rspec>, ["~> 2.8.0"])
-    s.add_dependency(%q<rdoc>, ["~> 3.12"])
+    s.add_dependency(%q<rdoc>, "~> 6.3")
     s.add_dependency(%q<bundler>, ["~> 1.1.0"])
     s.add_dependency(%q<jeweler>, ["~> 1.8.4"])
     s.add_dependency(%q<simplecov>, ["~> 0.6.4"])