diff --git a/lib/review/version.rb b/lib/review/version.rb
index bcba8f6fb..7bb7b0e19 100644
--- a/lib/review/version.rb
+++ b/lib/review/version.rb
@@ -1,3 +1,3 @@
 module ReVIEW
-  VERSION = '3.0.0.preview3'.freeze
+  VERSION = '3.0.0.preview4'.freeze
 end
diff --git a/review.gemspec b/review.gemspec
index 91ca684ee..0e1d80c17 100644
--- a/review.gemspec
+++ b/review.gemspec
@@ -12,7 +12,7 @@ Gem::Specification.new do |gem|
   gem.summary     = 'Re:VIEW: a easy-to-use digital publishing system'
   gem.description = 'Re:VIEW is a digital publishing system for books and ebooks. It supports InDesign, EPUB and LaTeX.'
   gem.required_rubygems_version = Gem::Requirement.new('>= 0') if gem.respond_to? :required_rubygems_version=
-  gem.date = '2018-10-16'
+  gem.date = '2018-10-28'
 
   gem.files         = `git ls-files`.split("\n")
   gem.test_files    = `git ls-files -- {test,spec,features}/*`.split("\n")