diff --git a/README.md b/README.md
index de53150d..71eea42a 100644
--- a/README.md
+++ b/README.md
@@ -130,12 +130,16 @@ In order to build and test Gherkin for JavaScript you must install:
 * Node.js (0.4.6 or higher)
 * NPM (0.3.18 or higher)
 * Ragel with JavaScript support: http://github.com/dominicmarks/ragel-js
+** Make sure you have `autoconf` and `automake` (`brew install automake && brew install autoconf`)
+** Make sure you have the official ragel (`brew install ragel`)
+** Make sure you have kelbt (`brew install kelbt`). If that fails, install manually from http://www.complang.org/kelbt/
+** `cd ragel-js/ragel-svn && ./autogen.sh && ./configure --disable-manual`
 * Define the GHERKIN_JS environment variable in your shell (any value will do)
 
 Prepare the environment:
 
     pushd js
-    npm link
+    npm install
     popd
 
 Now you can build the JavaScript with:
diff --git a/gherkin.gemspec b/gherkin.gemspec
index 0e1e6a57..0bdbfffc 100644
--- a/gherkin.gemspec
+++ b/gherkin.gemspec
@@ -60,7 +60,7 @@ Gem::Specification.new do |s|
 
   s.add_development_dependency('cucumber', '>= 1.1.9')
   s.add_development_dependency('rake', '>= 0.9.2')
-  s.add_development_dependency('bundler', '>= 1.0.22')
+  s.add_development_dependency('bundler', '>= 1.1.1')
   s.add_development_dependency('rspec', '~> 2.7.0') # No 2.8.0 until this is fixed: https://github.com/rspec/rspec-expectations/issues/112
   s.add_development_dependency('rubyzip', '>= 0.9.6.1')
 
diff --git a/js/package.json b/js/package.json
index ea8b57b5..3165d49b 100644
--- a/js/package.json
+++ b/js/package.json
@@ -20,5 +20,5 @@
     , "url" : "http://github.com/cucumber/gherkin/raw/master/LICENSE"
     }
   ]
-, "devDependencies" : { "uglify-js" : "1.1.1" }
+, "devDependencies" : { "uglify-js" : "1.2.5" }
 }