diff --git a/factree.gemspec b/factree.gemspec
index cb11072..de565fc 100644
--- a/factree.gemspec
+++ b/factree.gemspec
@@ -21,7 +21,7 @@ Gem::Specification.new do |spec|
   spec.require_paths = ["lib"]
 
   spec.add_development_dependency "bundler", "~> 2.1"
-  spec.add_development_dependency "rake", "~> 10.0"
+  spec.add_development_dependency "rake", "~> 13.0"
   spec.add_development_dependency "minitest", "~> 5.0"
   spec.add_development_dependency "pry"
   spec.add_development_dependency "yard", "~> 0.9"