diff --git a/range_math.gemspec b/range_math.gemspec
new file mode 100644
index 0000000..8d5f473
--- /dev/null
+++ b/range_math.gemspec
@@ -0,0 +1,61 @@
+# 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 = "range_math"
+  s.version = "0.1.0"
+
+  s.required_rubygems_version = Gem::Requirement.new(">= 0") if s.respond_to? :required_rubygems_version=
+  s.authors = ["muflax"]
+  s.date = "2011-12-04"
+  s.description = "use ranges in math expression"
+  s.email = "mail@muflax.com"
+  s.extra_rdoc_files = [
+    "LICENSE.txt",
+    "README"
+  ]
+  s.files = [
+    ".document",
+    "Gemfile",
+    "Gemfile.lock",
+    "LICENSE.txt",
+    "README",
+    "Rakefile",
+    "VERSION",
+    "lib/range_math.rb",
+    "test/helper.rb",
+    "test/test_range_math.rb"
+  ]
+  s.homepage = "http://github.com/muflax/range_math"
+  s.licenses = ["MIT"]
+  s.require_paths = ["lib"]
+  s.rubygems_version = "1.8.11"
+  s.summary = "do math on ranges"
+
+  if s.respond_to? :specification_version then
+    s.specification_version = 3
+
+    if Gem::Version.new(Gem::VERSION) >= Gem::Version.new('1.2.0') then
+      s.add_development_dependency(%q<shoulda>, [">= 0"])
+      s.add_development_dependency(%q<bundler>, ["~> 1.0.0"])
+      s.add_development_dependency(%q<jeweler>, ["~> 1.6.4"])
+      s.add_development_dependency(%q<rcov>, [">= 0"])
+      s.add_development_dependency(%q<rdoc>, [">= 0"])
+    else
+      s.add_dependency(%q<shoulda>, [">= 0"])
+      s.add_dependency(%q<bundler>, ["~> 1.0.0"])
+      s.add_dependency(%q<jeweler>, ["~> 1.6.4"])
+      s.add_dependency(%q<rcov>, [">= 0"])
+      s.add_dependency(%q<rdoc>, [">= 0"])
+    end
+  else
+    s.add_dependency(%q<shoulda>, [">= 0"])
+    s.add_dependency(%q<bundler>, ["~> 1.0.0"])
+    s.add_dependency(%q<jeweler>, ["~> 1.6.4"])
+    s.add_dependency(%q<rcov>, [">= 0"])
+    s.add_dependency(%q<rdoc>, [">= 0"])
+  end
+end
+