diff --git a/cyclonedx-ruby.gemspec b/cyclonedx-ruby.gemspec
index d781f84..77c86aa 100644
--- a/cyclonedx-ruby.gemspec
+++ b/cyclonedx-ruby.gemspec
@@ -14,6 +14,6 @@ Gem::Specification.new do |spec|
   spec.add_dependency('nokogiri', '~> 1.8')
   spec.add_dependency('ostruct', '~> 0.1')
   spec.add_dependency('rest-client', '~> 2.0')
-  spec.add_development_dependency 'rake', '~> 12'
+  spec.add_development_dependency 'rake', '~> 13'
   spec.add_development_dependency 'rspec', '~> 3.7'
 end
\ No newline at end of file