diff --git a/Gemfile.lock b/Gemfile.lock
index de9eeaa..1055ece 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -52,7 +52,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
       slop (~> 3.4)
-    rake (10.1.0)
+    rake (13.0.1)
     rb-fsevent (0.10.2)
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)
@@ -92,7 +92,7 @@ DEPENDENCIES
   guard-bundler
   guard-rspec
   lightio!
-  rake (~> 10.0)
+  rake (~> 13.0)
   rspec (~> 3.0)
 
 BUNDLED WITH
diff --git a/lightio.gemspec b/lightio.gemspec
index 38a4dca..6bcdfca 100644
--- a/lightio.gemspec
+++ b/lightio.gemspec
@@ -25,6 +25,6 @@ Gem::Specification.new do |spec|
 
   spec.add_runtime_dependency "nio4r", "~> 2.2"
   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"
 end