diff --git a/Gemfile.lock b/Gemfile.lock
index 261c3577..6b44e700 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,7 +2,7 @@ PATH
   remote: .
   specs:
     auto_html (1.5.1)
-      redcarpet (~> 2.0.0)
+      redcarpet (>= 2.0, < 3.6)
       rinku (~> 1.5.0)
 
 GEM
@@ -74,7 +74,7 @@ GEM
     rake (0.9.2.2)
     rdoc (3.12)
       json (~> 1.4)
-    redcarpet (2.0.1)
+    redcarpet (3.5.1)
     rinku (1.5.1)
     sprockets (2.1.2)
       hike (~> 1.2)
diff --git a/auto_html.gemspec b/auto_html.gemspec
index 64fa1a78..7d698c23 100644
--- a/auto_html.gemspec
+++ b/auto_html.gemspec
@@ -11,7 +11,7 @@ Gem::Specification.new do |gem|
   gem.homepage = 'http://github.com/dejan/auto_html'
 
   gem.add_dependency('rinku', '~> 1.5.0')
-  gem.add_dependency('redcarpet', '~> 2.0.0')
+  gem.add_dependency('redcarpet', '>= 2.0', '< 3.6')
 
   # ensure the gem is built out of versioned files
   gem.files = Dir['Rakefile', '{bin,lib,man,test,spec}/**/*',