diff --git a/asciidoctor-epub3.gemspec b/asciidoctor-epub3.gemspec
index 5417cfc..5468de9 100644
--- a/asciidoctor-epub3.gemspec
+++ b/asciidoctor-epub3.gemspec
@@ -34,7 +34,7 @@ An extension for Asciidoctor that converts AsciiDoc documents to EPUB3 and KF8/M
   s.add_development_dependency 'asciimath', '~> 2.0'
   s.add_development_dependency 'coderay', '~> 1.1.0'
   s.add_development_dependency 'pygments.rb', '~> 2.4.0'
-  s.add_development_dependency 'rake', '~> 13.0.0'
+  s.add_development_dependency 'rake', '~> 13.1.0'
   s.add_development_dependency 'rouge', '~> 3.0'
   s.add_development_dependency 'rspec', '~> 3.12.0'
   s.add_development_dependency 'rubocop', '~> 1.28.2'