diff --git a/epubcheck.gemspec b/epubcheck.gemspec
new file mode 100644
index 0000000..97acaf6
--- /dev/null
+++ b/epubcheck.gemspec
@@ -0,0 +1,54 @@
+# Generated by jeweler
+# DO NOT EDIT THIS FILE DIRECTLY
+# Instead, edit Jeweler::Tasks in Rakefile, and run 'rake gemspec'
+# -*- encoding: utf-8 -*-
+
+Gem::Specification.new do |s|
+  s.name = "epubcheck"
+  s.version = "3.0.0"
+
+  s.required_rubygems_version = Gem::Requirement.new(">= 0") if s.respond_to? :required_rubygems_version=
+  s.authors = ["jugyo"]
+  s.date = "2013-01-22"
+  s.description = "This is a command-line ePub check tool. It is wrapper of epubcheck(http://code.google.com/p/epubcheck/)."
+  s.email = "jugyo.org@gmail.com"
+  s.executables = ["epubcheck"]
+  s.extra_rdoc_files = [
+    "LICENSE",
+    "README.rdoc"
+  ]
+  s.files = [
+    "lib/epubcheck-1.0.5/COPYING.txt",
+    "lib/epubcheck-1.0.5/README.txt",
+    "lib/epubcheck-1.0.5/epubcheck-1.0.5.jar",
+    "lib/epubcheck-1.0.5/jing_license.txt",
+    "lib/epubcheck-1.0.5/lib/saxon.jar",
+    "lib/epubcheck-3.0/COPYING.txt",
+    "lib/epubcheck-3.0/README.txt",
+    "lib/epubcheck-3.0/THIRD-PARTY.txt",
+    "lib/epubcheck-3.0/epubcheck-3.0.jar",
+    "lib/epubcheck-3.0/lib/commons-compress-1.4.1.jar",
+    "lib/epubcheck-3.0/lib/guava-13.0.1.jar",
+    "lib/epubcheck-3.0/lib/jing-20120724.0.0.jar",
+    "lib/epubcheck-3.0/lib/sac-1.3.jar",
+    "lib/epubcheck-3.0/lib/saxon-9.1.0.8.jar",
+    "lib/epubcheck-3.0/licenses/Apache-2.0.txt",
+    "lib/epubcheck-3.0/licenses/BSD-3-Clause.txt",
+    "lib/epubcheck-3.0/licenses/MPL-1.0.txt",
+    "lib/epubcheck-3.0/licenses/W3C.txt"
+  ]
+  s.homepage = "http://github.com/jugyo/epubcheck"
+  s.require_paths = ["lib"]
+  s.rubygems_version = "1.8.24"
+  s.summary = "command-line ePub check tool"
+
+  if s.respond_to? :specification_version then
+    s.specification_version = 3
+
+    if Gem::Version.new(Gem::VERSION) >= Gem::Version.new('1.2.0') then
+    else
+    end
+  else
+  end
+end
+