diff --git a/slacked.gemspec b/slacked.gemspec
index 4a5c010..53b0e08 100644
--- a/slacked.gemspec
+++ b/slacked.gemspec
@@ -33,7 +33,7 @@ Gem::Specification.new do |spec|
   spec.require_paths = ['lib']
 
   spec.add_development_dependency 'bundler'
-  spec.add_development_dependency 'rake', '~> 10.0'
+  spec.add_development_dependency 'rake', '~> 13.3'
   spec.add_development_dependency 'rspec'
   spec.add_development_dependency 'rspec-mocks'