diff --git a/MIT-LICENSE b/LICENSE.txt
similarity index 94%
rename from MIT-LICENSE
rename to LICENSE.txt
index f2e4d631a..97cb890a0 100644
--- a/MIT-LICENSE
+++ b/LICENSE.txt
@@ -1,4 +1,4 @@
-Copyright 2012-2014 Stephen Potenza <potenza@gmail.com>
+Copyright 2012-2018 Stephen Potenza <potenza@gmail.com>
 
 Permission is hereby granted, free of charge, to any person obtaining
 a copy of this software and associated documentation files (the
diff --git a/bootstrap_form.gemspec b/bootstrap_form.gemspec
index 2510a7eaa..02eefe81e 100644
--- a/bootstrap_form.gemspec
+++ b/bootstrap_form.gemspec
@@ -1,6 +1,5 @@
-$:.push File.expand_path("../lib", __FILE__)
-
-# Maintain your gem's version:
+lib = File.expand_path("../lib", __FILE__)
+$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
 require "bootstrap_form/version"
 
 # Describe your gem and declare its dependencies:
@@ -9,20 +8,25 @@ Gem::Specification.new do |s|
   s.version     = BootstrapForm::VERSION
   s.authors     = ["Stephen Potenza", "Carlos Lopes"]
   s.email       = ["potenza@gmail.com", "carlos.el.lopes@gmail.com"]
-  s.homepage    = "http://github.com/bootstrap-ruby/rails-bootstrap-forms"
-  s.summary     = "Rails form builder that makes it easy to style forms using Twitter Bootstrap 3+"
-  s.description = "bootstrap_form is a rails form builder that makes it super easy to create beautiful-looking forms using Twitter Bootstrap 3+"
+  s.homepage    = "https://github.com/bootstrap-ruby/rails-bootstrap-forms"
+  s.summary     = "Rails form builder that makes it easy to style forms using "\
+                  "Bootstrap 4"
+  s.description = "bootstrap_form is a rails form builder that makes it super "\
+                  "easy to create beautiful-looking forms using Bootstrap 4"
+  s.license     = "MIT"
 
-  s.files = Dir["{app,config,db,lib}/**/*"] + ["MIT-LICENSE", "Rakefile", "README.md"]
-  s.test_files = Dir["test/**/*"]
+  s.files = `git ls-files -z`.split("\x0").reject do |f|
+    f.match(%r{^(test|spec|features)/})
+  end
+  s.bindir = "exe"
 
+  s.add_development_dependency "appraisal"
+  s.add_development_dependency "diffy"
+  s.add_development_dependency "equivalent-xml"
   s.add_development_dependency "mime-types", "~> 2.6.2"
+  s.add_development_dependency "mocha"
+  s.add_development_dependency "nokogiri"
   s.add_development_dependency "rails", ">= 4.0"
   s.add_development_dependency "sqlite3"
   s.add_development_dependency "timecop", "~> 0.7.1"
-  s.add_development_dependency "mocha"
-  s.add_development_dependency "appraisal"
-  s.add_development_dependency "equivalent-xml"
-  s.add_development_dependency "nokogiri"
-  s.add_development_dependency "diffy"
 end
diff --git a/lib/bootstrap_form/version.rb b/lib/bootstrap_form/version.rb
index b8ef5efb2..603ffe175 100644
--- a/lib/bootstrap_form/version.rb
+++ b/lib/bootstrap_form/version.rb
@@ -1,3 +1,3 @@
 module BootstrapForm
-  VERSION = "2.7.0".freeze
+  VERSION = "4.0.0.dev".freeze
 end