jekyll-watch.gemspec in jekyll-watch-1.0.0.rc1 vs jekyll-watch.gemspec in jekyll-watch-1.0.0.rc2

@@ -1,10 +1,10 @@
 # coding: utf-8
 
 Gem::Specification.new do |spec|
   spec.name          = "jekyll-watch"
-  spec.version       = "1.0.0.rc1"
+  spec.version       = "1.0.0.rc2"
   spec.authors       = ["Parker Moore"]
   spec.email         = ["[e-mail]"]
   spec.summary       = %q{Rebuild your Jekyll site when a file changes with the `--watch` switch.}
   spec.homepage      = "https://github.com/jekyll/jekyll-watch"
   spec.license       = "MIT"
@@ -13,9 +13,15 @@
   spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
   spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths = ["lib"]
 
   spec.add_runtime_dependency "listen", "~> 2.7"
+
+  require 'rbconfig'
+  if RbConfig::CONFIG['host_os'] =~ /mswin|mingw|cygwin/
+    spec.add_runtime_dependency "wdm", "~> 0.1.0"
+  end
+
 
   spec.add_development_dependency "bundler", "~> 1.6"
   spec.add_development_dependency "rake"
 end