diff --git a/Gemfile.lock b/Gemfile.lock
index 388eee3..a8bec6a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -7,7 +7,7 @@ GEM
   remote: https://rubygems.org/
   specs:
     minitest (5.11.3)
-    rake (10.5.0)
+    rake (13.0.1)
 
 PLATFORMS
   ruby
@@ -15,7 +15,7 @@ PLATFORMS
 DEPENDENCIES
   bundler (~> 1.16)
   minitest (~> 5.0)
-  rake (~> 10.0)
+  rake (~> 13.0)
   serverb!
 
 BUNDLED WITH
diff --git a/serverb.gemspec b/serverb.gemspec
index 76e2df4..66e5988 100644
--- a/serverb.gemspec
+++ b/serverb.gemspec
@@ -32,6 +32,6 @@ 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 "minitest", "~> 5.0"
 end