diff --git a/gem/Gemfile.lock b/gem/Gemfile.lock
index a10a7ad..1d278ea 100644
--- a/gem/Gemfile.lock
+++ b/gem/Gemfile.lock
@@ -28,7 +28,7 @@ GEM
       method_source (~> 0.8.1)
       slop (~> 3.4)
     rainbow (3.0.0)
-    rake (11.3.0)
+    rake (12.3.3)
     rspec (3.7.0)
       rspec-core (~> 3.7.0)
       rspec-expectations (~> 3.7.0)
@@ -66,7 +66,7 @@ PLATFORMS
 DEPENDENCIES
   earlgrey!
   pry (~> 0.10.3)
-  rake (~> 11.1)
+  rake (~> 12.3)
   rspec (>= 3.4.0)
   rubocop (>= 0.39.0)
 
diff --git a/gem/earlgrey.gemspec b/gem/earlgrey.gemspec
index b1fd869..d9bbffe 100644
--- a/gem/earlgrey.gemspec
+++ b/gem/earlgrey.gemspec
@@ -32,7 +32,7 @@ Gem::Specification.new do |s|
   s.add_runtime_dependency 'xcodeproj', '>= 1.3.0'
 
   s.add_development_dependency 'pry',         '~> 0.10.3'
-  s.add_development_dependency 'rake',        '~> 11.1'
+  s.add_development_dependency 'rake',        '~> 12.3'
   s.add_development_dependency 'rspec',       '>= 3.4.0'
   s.add_development_dependency 'rubocop',     '>= 0.39.0'