diff --git a/Gemfile.lock b/Gemfile.lock
index 0c52fcd..bbf90f1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -13,7 +13,7 @@ GEM
     nokogiri (1.8.2)
       mini_portile2 (~> 2.3.0)
     rack (2.0.4)
-    rake (10.5.0)
+    rake (13.0.1)
     rspec (3.7.0)
       rspec-core (~> 3.7.0)
       rspec-expectations (~> 3.7.0)
@@ -34,7 +34,7 @@ PLATFORMS
 DEPENDENCIES
   bundler (~> 1.16)
   rack-diet!
-  rake (~> 10.0)
+  rake (~> 13.0)
   rspec (~> 3.0)
 
 BUNDLED WITH
diff --git a/rack-diet.gemspec b/rack-diet.gemspec
index 88d7dad..64d7687 100644
--- a/rack-diet.gemspec
+++ b/rack-diet.gemspec
@@ -24,7 +24,7 @@ Gem::Specification.new do |spec|
   spec.require_paths = ["lib"]
 
   spec.add_development_dependency "bundler", "~> 1.16"
-  spec.add_development_dependency "rake", "~> 10.0"
+  spec.add_development_dependency "rake", "~> 13.0"
   spec.add_development_dependency "rspec", "~> 3.0"
 
   spec.add_runtime_dependency "nokogiri"