diff --git a/Gemfile b/Gemfile
index 8d779ab..536c29a 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,7 +3,7 @@ gemspec
 
 group :test do
   gem 'rspec', '~> 2.12'
-  gem 'rake', '~> 10.0.1'
+  gem 'rake', '~> 12.3.3'
   gem 'simplecov', :require => false
   gem 'mutant'
   gem 'json'
diff --git a/Gemfile.lock b/Gemfile.lock
index d4e0812..aeb3dd4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -33,7 +33,7 @@ GEM
       rspec (~> 2.13.0)
       to_source (~> 0.2.19)
     mutant-melbourne (2.0.3)
-    rake (10.0.4)
+    rake (12.3.3)
     rspec (2.13.0)
       rspec-core (~> 2.13.0)
       rspec-expectations (~> 2.13.0)
@@ -59,6 +59,6 @@ DEPENDENCIES
   dag!
   json
   mutant
-  rake (~> 10.0.1)
+  rake (~> 12.3.3)
   rspec (~> 2.12)
   simplecov
diff --git a/dag.gemspec b/dag.gemspec
index 7a5cb05..697946d 100644
--- a/dag.gemspec
+++ b/dag.gemspec
@@ -8,7 +8,7 @@ Gem::Specification.new do |s|
   s.email       = 'kevin@rutherford-software.com'
   s.homepage    = 'http://github.com/kevinrutherford/dag'
 
-  s.add_development_dependency 'rake', '~> 10.0.1'
+  s.add_development_dependency 'rake', '~> 12.3.3'
   s.add_development_dependency 'rspec', '~> 2.12'
   s.add_development_dependency 'simplecov'