diff --git a/Gemfile.lock b/Gemfile.lock
index 1eb8bf9..fe0c9d7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -7,7 +7,7 @@ GEM
   remote: https://rubygems.org/
   specs:
     diff-lcs (1.3)
-    rake (10.5.0)
+    rake (12.3.3)
     rake-compiler (0.8.3)
       rake
     rspec (3.6.0)
@@ -28,7 +28,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  rake (~> 10.5)
+  rake (~> 12.3)
   rake-compiler (~> 0.8.3)
   rspec (~> 3.6)
   ruby_deep_clone!
diff --git a/deep_clone.gemspec b/deep_clone.gemspec
index e67efe9..8822eab 100644
--- a/deep_clone.gemspec
+++ b/deep_clone.gemspec
@@ -17,7 +17,7 @@ Gem::Specification.new do |s|
   s.files = Dir.glob('lib/**/*.rb') +
             Dir.glob('ext/**/*.{c,h,rb}')
 
-  s.add_development_dependency('rake', '~> 10.5')
+  s.add_development_dependency('rake', '~> 12.3')
   s.add_development_dependency('rake-compiler', '~> 0.8.3')
   s.add_development_dependency('rspec', '~> 3.6')
 end