diff --git a/CHANGELOG.md b/CHANGELOG.md
index f084c97..aed1d80 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 ### Added
 ### Changed
+- Update swagger-ui version to 3.23.11 [#239](https://github.com/rswag/rswag/pull/239)
 ### Deprecated
 ### Removed
 ### Fixed
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 0f25fff..7db3926 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -50,6 +50,19 @@ Push to your fork and [submit a Pull Request][pr].
 
 [pr]: https://github.com/rswag/rswag/compare/
 
+## Updating Swagger UI
+
+Find the latest versions of swagger-ui here:  
+https://github.com/swagger-api/swagger-ui/releases
+
+Update the swagger-ui-dist version in the rswag-ui dependencies
+```  
+./rswag-ui/package.json
+```
+
+Navigate to the rswag-ui folder and run npm install to update the package-lock.json
+
+
 ## Release
 (for maintainers)
 
diff --git a/Gemfile b/Gemfile
index c9d5c4e..b9f1fbe 100644
--- a/Gemfile
+++ b/Gemfile
@@ -28,7 +28,8 @@ group :test do
   gem 'rspec-rails'
   gem 'generator_spec'
   gem 'capybara'
-  gem 'capybara-webkit'
+  gem 'geckodriver-helper'
+  gem 'selenium-webdriver'
   gem 'rswag-specs', path: './rswag-specs'
 end
 
diff --git a/rswag-ui/package-lock.json b/rswag-ui/package-lock.json
index 144573b..8bc72e8 100644
--- a/rswag-ui/package-lock.json
+++ b/rswag-ui/package-lock.json
@@ -5,9 +5,9 @@
   "requires": true,
   "dependencies": {
     "swagger-ui-dist": {
-      "version": "3.18.2",
-      "resolved": "https://registry.npmjs.org/swagger-ui-dist/-/swagger-ui-dist-3.18.2.tgz",
-      "integrity": "sha512-pWAEiKkgWUJvjmLW9AojudnutJ+NTn5g6OdNLj1iIJWwCkoy40K3Upwa24DqFbmIE4vLX4XplND61hp2L+s5vg=="
+      "version": "3.23.11",
+      "resolved": "https://registry.npmjs.org/swagger-ui-dist/-/swagger-ui-dist-3.23.11.tgz",
+      "integrity": "sha512-ipENHHH/sqpngTpHXUwg55eAOZ7b2UVayUwwuWPA6nQSPhjBVXX4zOPpNKUwQIFOl3oIwVvZF7mqoxH7pMgVzA=="
     }
   }
 }
diff --git a/rswag-ui/package.json b/rswag-ui/package.json
index 27dbc6c..fd299d1 100644
--- a/rswag-ui/package.json
+++ b/rswag-ui/package.json
@@ -3,6 +3,6 @@
   "version": "1.0.0",
   "private": true,
   "dependencies": {
-    "swagger-ui-dist": "3.18.2"
+    "swagger-ui-dist": "3.23.11"
   }
 }
diff --git a/test-app/db/schema.rb b/test-app/db/schema.rb
index 8accba1..e01f8f3 100644
--- a/test-app/db/schema.rb
+++ b/test-app/db/schema.rb
@@ -2,15 +2,15 @@
 # of editing this file, please use the migrations feature of Active Record to
 # incrementally modify your database, and then regenerate this schema definition.
 #
-# Note that this schema.rb definition is the authoritative source for your
-# database schema. If you need to create the application database on another
-# system, you should be using db:schema:load, not running all the migrations
-# from scratch. The latter is a flawed and unsustainable approach (the more migrations
-# you'll amass, the slower it'll run and the greater likelihood for issues).
+# This file is the source Rails uses to define your schema when running `rails
+# db:schema:load`. When creating a new database, `rails db:schema:load` tends to
+# be faster and is potentially less error prone than running all of your
+# migrations from scratch. Old migrations may fail to apply correctly if those
+# migrations use external dependencies or application code.
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20160218212104) do
+ActiveRecord::Schema.define(version: 2016_02_18_212104) do
 
   create_table "blogs", force: :cascade do |t|
     t.string "title"
diff --git a/test-app/spec/features/swagger_ui_spec.rb b/test-app/spec/features/swagger_ui_spec.rb
index 24d5790..484ad65 100644
--- a/test-app/spec/features/swagger_ui_spec.rb
+++ b/test-app/spec/features/swagger_ui_spec.rb
@@ -5,8 +5,8 @@ RSpec.feature 'swagger-ui', js: true do
   scenario 'browsing api-docs' do
     visit '/api-docs'
 
-    expect(page).to have_content('GET /blogs Searches blogs')
-    expect(page).to have_content('POST /blogs Creates a blog')
-    expect(page).to have_content('GET /blogs/{id} Retrieves a blog')
+    expect(page).to have_content('GET /blogs Searches blogs', normalize_ws: true)
+    expect(page).to have_content('POST /blogs Creates a blog', normalize_ws: true)
+    expect(page).to have_content('GET /blogs/{id} Retrieves a blog', normalize_ws: true)
   end
 end
diff --git a/test-app/spec/rails_helper.rb b/test-app/spec/rails_helper.rb
index 98c8fc3..3d9bd5f 100644
--- a/test-app/spec/rails_helper.rb
+++ b/test-app/spec/rails_helper.rb
@@ -51,9 +51,12 @@ RSpec.configure do |config|
   # arbitrary gems may also be filtered via:
   # config.filter_gems_from_backtrace("gem name")
 
-  Capybara.javascript_driver = :webkit
-end
+  Capybara.register_driver :firefox_headless do |app|
+    options = ::Selenium::WebDriver::Firefox::Options.new
+    options.args << '--headless'
 
-Capybara::Webkit.configure do |config|
-  config.block_unknown_urls
+    Capybara::Selenium::Driver.new(app, browser: :firefox, options: options)
+  end
+
+  Capybara.javascript_driver = :firefox_headless
 end