diff --git a/Gemfile b/Gemfile
index 0a9826a6..e9e282d1 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,7 +8,7 @@ group :development do
   gem "rspec"      ,"3.0.0"
   gem "rspec-collection_matchers"
   gem "yard"       ,"~> 0.8.7"
-  gem "redcarpet"  ,"~> 2.3.0"
+  gem "redcarpet"  ,"~> 3.5.1"
   #em "rdiscount"  ,"~> 2.1.7"
 
   gem "term-ansicolor"
diff --git a/Gemfile.lock b/Gemfile.lock
index 68221b44..7b4186ba 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -9,7 +9,7 @@ GEM
     multi_json (1.10.1)
     rake (10.3.2)
     rcov (0.9.11)
-    redcarpet (2.3.0)
+    redcarpet (3.5.1)
     rspec (3.0.0)
       rspec-core (~> 3.0.0)
       rspec-expectations (~> 3.0.0)
@@ -43,10 +43,9 @@ DEPENDENCIES
   cantor (~> 1.2.1)
   rake
   rcov (~> 0.9.9)
-  redcarpet (~> 2.3.0)
+  redcarpet (~> 3.5.1)
   rspec (= 3.0.0)
   rspec-collection_matchers
   simplecov
   term-ansicolor
-  tins (= 1.3.0)
   yard (~> 0.8.7)