diff --git a/.gitignore b/.gitignore
index d71c8121..c517e53c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,4 @@
 .bundle
-Gemfile.lock
-gemfiles/*.lock
 
 ## MAC OS
 .DS_Store
@@ -23,7 +21,6 @@ coverage
 rdoc
 pkg
 tmp
-capybara*.html
 .rvmrc
 
 ## PROJECT::SPECIFIC
diff --git a/Gemfile b/Gemfile
index a7e76462..a91053b2 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,6 +8,18 @@ source "https://rubygems.org"
 # Uncomment this to use development version of html formatter from github
 # gem 'simplecov-html', :github => 'colszowka/simplecov-html'
 
+group :development do
+  gem "aruba", "~> 0.14"
+  gem "capybara", "< 3"
+  gem "cucumber", "~> 3.1"
+  gem "phantomjs"
+  gem "poltergeist"
+  gem "rake", "~> 12.0"
+  gem "rspec", "~> 3.2"
+  gem "rubocop", "0.53.0"
+  gem "test-unit"
+end
+
 group :benchmark do
   gem "benchmark-ips"
 end
diff --git a/Gemfile.lock b/Gemfile.lock
new file mode 100644
index 00000000..5c7b24fd
--- /dev/null
+++ b/Gemfile.lock
@@ -0,0 +1,125 @@
+PATH
+  remote: .
+  specs:
+    simplecov (0.18.0.pre.dev)
+      docile (~> 1.1)
+      simplecov-html (~> 0.10.0)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.7.0)
+      public_suffix (>= 2.0.2, < 5.0)
+    aruba (0.14.12)
+      childprocess (>= 0.6.3, < 4.0.0)
+      contracts (~> 0.9)
+      cucumber (>= 1.3.19)
+      ffi (~> 1.9)
+      rspec-expectations (>= 2.99)
+      thor (~> 0.19)
+    ast (2.4.0)
+    backports (3.15.0)
+    benchmark-ips (2.7.2)
+    builder (3.2.3)
+    capybara (2.18.0)
+      addressable
+      mini_mime (>= 0.1.3)
+      nokogiri (>= 1.3.3)
+      rack (>= 1.0.0)
+      rack-test (>= 0.5.4)
+      xpath (>= 2.0, < 4.0)
+    childprocess (3.0.0)
+    cliver (0.3.2)
+    contracts (0.16.0)
+    cucumber (3.1.2)
+      builder (>= 2.1.2)
+      cucumber-core (~> 3.2.0)
+      cucumber-expressions (~> 6.0.1)
+      cucumber-wire (~> 0.0.1)
+      diff-lcs (~> 1.3)
+      gherkin (~> 5.1.0)
+      multi_json (>= 1.7.5, < 2.0)
+      multi_test (>= 0.1.2)
+    cucumber-core (3.2.1)
+      backports (>= 3.8.0)
+      cucumber-tag_expressions (~> 1.1.0)
+      gherkin (~> 5.0)
+    cucumber-expressions (6.0.1)
+    cucumber-tag_expressions (1.1.1)
+    cucumber-wire (0.0.1)
+    diff-lcs (1.3)
+    docile (1.3.2)
+    ffi (1.11.3)
+    gherkin (5.1.0)
+    mini_mime (1.0.2)
+    mini_portile2 (2.4.0)
+    multi_json (1.14.1)
+    multi_test (0.1.2)
+    nokogiri (1.10.5)
+      mini_portile2 (~> 2.4.0)
+    parallel (1.19.1)
+    parser (2.6.5.0)
+      ast (~> 2.4.0)
+    phantomjs (2.1.1.0)
+    poltergeist (1.18.1)
+      capybara (>= 2.1, < 4)
+      cliver (~> 0.3.1)
+      websocket-driver (>= 0.2.0)
+    power_assert (1.1.5)
+    powerpack (0.1.2)
+    public_suffix (4.0.1)
+    rack (2.0.7)
+    rack-test (1.1.0)
+      rack (>= 1.0, < 3)
+    rainbow (3.0.0)
+    rake (12.3.3)
+    rspec (3.9.0)
+      rspec-core (~> 3.9.0)
+      rspec-expectations (~> 3.9.0)
+      rspec-mocks (~> 3.9.0)
+    rspec-core (3.9.0)
+      rspec-support (~> 3.9.0)
+    rspec-expectations (3.9.0)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.9.0)
+    rspec-mocks (3.9.0)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.9.0)
+    rspec-support (3.9.0)
+    rubocop (0.53.0)
+      parallel (~> 1.10)
+      parser (>= 2.5)
+      powerpack (~> 0.1)
+      rainbow (>= 2.2.2, < 4.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (~> 1.0, >= 1.0.1)
+    ruby-progressbar (1.10.1)
+    simplecov-html (0.10.2)
+    test-unit (3.3.4)
+      power_assert
+    thor (0.20.3)
+    unicode-display_width (1.6.0)
+    websocket-driver (0.7.1)
+      websocket-extensions (>= 0.1.0)
+    websocket-extensions (0.1.4)
+    xpath (3.2.0)
+      nokogiri (~> 1.8)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  aruba (~> 0.14)
+  benchmark-ips
+  capybara (< 3)
+  cucumber (~> 3.1)
+  phantomjs
+  poltergeist
+  rake (~> 12.0)
+  rspec (~> 3.2)
+  rubocop (= 0.53.0)
+  simplecov!
+  test-unit
+
+BUNDLED WITH
+   2.0.2
diff --git a/simplecov.gemspec b/simplecov.gemspec
index 0207d37c..1d6a2a45 100644
--- a/simplecov.gemspec
+++ b/simplecov.gemspec
@@ -19,17 +19,6 @@ Gem::Specification.new do |gem|
   gem.add_dependency "docile", "~> 1.1"
   gem.add_dependency "simplecov-html", "~> 0.10.0"
 
-  gem.add_development_dependency "aruba", "~> 0.14"
-  gem.add_development_dependency "bundler"
-  gem.add_development_dependency "capybara", "< 3"
-  gem.add_development_dependency "cucumber", "~> 3.1"
-  gem.add_development_dependency "phantomjs"
-  gem.add_development_dependency "poltergeist"
-  gem.add_development_dependency "rake", "~> 12.0"
-  gem.add_development_dependency "rspec", "~> 3.2"
-  gem.add_development_dependency "rubocop", "0.53.0"
-  gem.add_development_dependency "test-unit"
-
   gem.files         = Dir["{lib}/**/*.*", "bin/*", "LICENSE", "*.md", "doc/*"]
   gem.require_paths = ["lib"]
 end