diff --git a/README.md b/README.md
index ba903dcf..234d7e38 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,9 @@
 [![Bower Version](https://badge.fury.io/bo/bootstrap-sass.svg)](http://badge.fury.io/bo/bootstrap-sass)
 [![Build Status](https://img.shields.io/travis/twbs/bootstrap-sass.svg)](https://travis-ci.org/twbs/bootstrap-sass)
 
-`bootstrap-sass` is a Sass-powered version of [Bootstrap](https://github.com/twbs/bootstrap), ready to drop right into your Sass powered applications.
+`bootstrap-sass` is a Sass-powered version of [Bootstrap](https://github.com/twbs/bootstrap) 3, ready to drop right into your Sass powered applications.
+
+This is Bootstrap 3. For Bootstrap 4 use the [Bootstrap Ruby gem](http://github.com/twbs/bootstrap-rubygem) if you use Ruby, and the [main repo](http://github.com/twbs/bootstrap) otherwise.
 
 ## Installation
 
diff --git a/bootstrap-sass.gemspec b/bootstrap-sass.gemspec
index 4f92b989..c8f833d9 100644
--- a/bootstrap-sass.gemspec
+++ b/bootstrap-sass.gemspec
@@ -3,12 +3,12 @@ $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
 require 'bootstrap-sass/version'
 
 Gem::Specification.new do |s|
-  s.name     = "bootstrap-sass"
+  s.name     = 'bootstrap-sass'
   s.version  = Bootstrap::VERSION
-  s.authors  = ["Thomas McDonald"]
+  s.authors  = ['Thomas McDonald']
   s.email    = 'tom@conceptcoding.co.uk'
-  s.summary  = "Twitter's Bootstrap, converted to Sass and ready to drop into Rails or Compass"
-  s.homepage = "https://github.com/twbs/bootstrap-sass"
+  s.summary  = 'bootstrap-sass is a Sass-powered version of Bootstrap 3, ready to drop right into your Sass powered applications.'
+  s.homepage = 'https://github.com/twbs/bootstrap-sass'
   s.license  = 'MIT'
 
   s.add_runtime_dependency 'sass', '>= 3.3.4'
diff --git a/bower.json b/bower.json
index f32c7f55..c4719e0b 100644
--- a/bower.json
+++ b/bower.json
@@ -7,7 +7,7 @@
     "Peter Gumeson",
     "Gleb Mazovetskiy"
   ],
-  "description": "bootstrap-sass is a Sass-powered version of Bootstrap, ready to drop right into your Sass powered applications.",
+  "description": "bootstrap-sass is a Sass-powered version of Bootstrap 3, ready to drop right into your Sass powered applications.",
   "moduleType": "globals",
   "main": [
     "assets/stylesheets/_bootstrap.scss",
diff --git a/composer.json b/composer.json
index 9d55fa74..ffc6b348 100644
--- a/composer.json
+++ b/composer.json
@@ -1,6 +1,6 @@
 {
     "name": "twbs/bootstrap-sass",
-    "description": "bootstrap-sass is a Sass-powered version of Bootstrap, ready to drop right into your Sass powered applications.",
+    "description": "bootstrap-sass is a Sass-powered version of Bootstrap 3, ready to drop right into your Sass powered applications.",
     "keywords": ["bootstrap", "css", "sass"],
     "homepage": "http://github.com/twbs/bootstrap-sass",
     "authors": [
diff --git a/package.json b/package.json
index c837b60e..87bc972a 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "bootstrap-sass",
   "version": "3.3.5",
-  "description": "bootstrap-sass is a Sass-powered version of Bootstrap, ready to drop right into your Sass powered applications.",
+  "description": "bootstrap-sass is a Sass-powered version of Bootstrap 3, ready to drop right into your Sass powered applications.",
   "main": "assets/javascripts/bootstrap.js",
   "repository": {
     "type": "git",
diff --git a/sache.json b/sache.json
index 02ec6858..c6c5a01d 100644
--- a/sache.json
+++ b/sache.json
@@ -1,5 +1,5 @@
 {
     "name": "bootstrap-sass",
-    "description": "bootstrap-sass is a Sass-powered version of Bootstrap, ready to drop right into your Sass powered applications",
+    "description": "bootstrap-sass is a Sass-powered version of Bootstrap 3, ready to drop right into your Sass powered applications.",
     "tags": ["bootstrap", "grid", "typography", "buttons", "ui", "responsive-web-design"]
 }