diff --git a/Gemfile b/Gemfile
index 165f6d01c..8e52ae791 100644
--- a/Gemfile
+++ b/Gemfile
@@ -6,11 +6,11 @@ gem 'asciidoctor', '1.5.6.2'
 gem 'json'
 gem 'awesome_print'
 
-gem 'asciidoctor-epub3', '~> 1.5.0.alpha.9'
+gem 'asciidoctor-epub3', '~> 1.5.0.alpha.14'
 gem 'asciidoctor-pdf', '~> 1.5.0.beta.8'
 
 gem 'coderay'
 gem 'pygments.rb'
 gem 'thread_safe'
-gem 'epubcheck'
+gem 'epubcheck-ruby'
 gem 'kindlegen'
diff --git a/progit.asc b/progit.asc
index 30d0c5ea5..35f35031f 100644
--- a/progit.asc
+++ b/progit.asc
@@ -9,8 +9,6 @@ Scott Chacon; Ben Straub
 :front-cover-image: image:book/cover.png[width=1050,height=1600]
 :icons: font
 
-ifdef::ebook-format[:leveloffset: -1]
-
 include::book/license.asc[]
 
 include::book/preface_schacon.asc[]