diff --git a/Gemfile b/Gemfile
index 0657fbd..4ecbca8 100644
--- a/Gemfile
+++ b/Gemfile
@@ -13,7 +13,7 @@ gem 'asciidoctor-pdf', '2.3.7'
 gem 'coderay', '1.1.3'
 gem 'pygments.rb', '2.4.0'
 gem 'thread_safe', '0.3.6'
-gem 'epubcheck-ruby', '5.0.0.0'
+gem 'epubcheck-ruby', '5.0.1.0'
 gem 'html-proofer', '5.0.7'
 gem 'kindlegen', '3.1.1'