diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..3fafbcd
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,3 @@
+# 0.1.0
+
+- Initial release
diff --git a/README.md b/README.md
index b6d04ab..8d4cd4c 100644
--- a/README.md
+++ b/README.md
@@ -31,7 +31,8 @@ Next, tell OmniAuth about this provider. For a Rails app, your `config/initializ
 
 ```ruby
 Rails.application.config.middleware.use OmniAuth::Builder do
-  provider :zoom, "API_KEY", "API_SECRET"
+  zoom_scopes = %i[user:read meeting:read meeting:write]
+  provider :zoom, zoom_client_id, zoom_client_secret, :scope => zoom_scopes.join(',')
 end
 ```
 
@@ -42,7 +43,51 @@ Replace `"API_KEY"` and `"API_SECRET"` with the appropriate values you obtained
 The auth hash `request.env['omniauth.auth']` would look like this:
 
 ```js
-TODO
+{
+    "result": {
+        "provider": "zoom",
+        "uid": "KdYKjnimT4KPd8FFgQt9FQ",
+        "info": {},
+        "credentials": {
+            "token": "ACCESS_TOKEN",
+            "refresh_token": "REFRESH_TOKEN",
+            "expires_at": 1594035991,
+            "expires": true
+        },
+        "extra": {
+            "raw_info": {
+                "id": "KdYKjnimT4KPd8FFgQt9FQ",
+                "first_name": "Jane",
+                "last_name": "Dev",
+                "email": "jane.dev@email.com",
+                "type": 2,
+                "role_name": "Owner",
+                "pmi": 1234567890,
+                "use_pmi": false,
+                "vanity_url": "https://janedevinc.zoom.us/my/janedev",
+                "personal_meeting_url": "https://janedevinc.zoom.us/j/1234567890",
+                "timezone": "America/Denver",
+                "verified": 1,
+                "dept": "",
+                "created_at": "2019-04-05T15:24:32Z",
+                "last_login_time": "2019-12-16T18:02:48Z",
+                "last_client_version": "4.6.12611.1124(mac)",
+                "pic_url": "https://janedev.zoom.us/p/KdYKjnimFR5Td8KKdQt9FQ/19f6430f-ca72-4154-8998-ede6be4542c7-837",
+                "host_key": "533895",
+                "jid": "kdykjnimt4kpd8kkdqt9fq@xmpp.zoom.us",
+                "group_ids": [],
+                "im_group_ids": [
+                    "3NXCD9VFTCOUH8LD-QciGw"
+                ],
+                "account_id": "gVcjZnYYRLDbb_MfgHuaxg",
+                "language": "en-US",
+                "phone_country": "US",
+                "phone_number": "+1 1234567891",
+                "status": "active"
+            }
+        }
+    }
+}
 ```
 
 ## Contributing
diff --git a/lib/omniauth-zoom/version.rb b/lib/omniauth-zoom/version.rb
index 6d07cec..432e95f 100644
--- a/lib/omniauth-zoom/version.rb
+++ b/lib/omniauth-zoom/version.rb
@@ -2,6 +2,6 @@
 
 module Omniauth
   module Zoom
-    VERSION = '0.0.1'
+    VERSION = '0.1.0'
   end
 end
diff --git a/lib/omniauth/strategies/zoom.rb b/lib/omniauth/strategies/zoom.rb
index 1d889b5..9f3474d 100644
--- a/lib/omniauth/strategies/zoom.rb
+++ b/lib/omniauth/strategies/zoom.rb
@@ -1,14 +1,14 @@
 # frozen_string_literal: true
 
+require 'base64'
+require 'oauth2'
 require 'omniauth-oauth2'
 
 module OmniAuth
   module Strategies
     class Zoom < OmniAuth::Strategies::OAuth2
       option :name, 'zoom'
-      option :client_options, site: 'https://zoom.us',
-                              authorize_url: '/oauth/authorize',
-                              token_url: '/oauth/token'
+      option :client_options, site: 'https://zoom.us'
 
       uid { raw_info[:id] }
 
@@ -16,16 +16,41 @@ class Zoom < OmniAuth::Strategies::OAuth2
         { raw_info: raw_info }
       end
 
-      def raw_info
-        return @raw_info unless @raw_info.nil?
+      protected
 
-        res = access_token.get '/v2/users/me'
-        @raw_info = JSON.parse(res.body, symbolize_names: true)
+      def build_access_token
+        params = {
+          grant_type: 'authorization_code',
+          code: request.params['code'],
+          redirect_uri: callback_url
+        }
+        path = "#{client.options[:token_url]}?#{params.to_query}"
+        token = Base64.strict_encode64("#{client.id}:#{client.secret}")
+        opts = { headers: { Authorization: "Basic #{token}" } }
+
+        response = client.request(:post, path, opts)
+        access_token_opts = response.parsed.merge(deep_symbolize(options.auth_token_params))
+        ::OAuth2::AccessToken.from_hash(client, access_token_opts).tap do |access_token|
+          if access_token.respond_to?(:response=)
+            access_token.response = response
+          end
+        end
       end
 
       def callback_url
         full_host + script_name + callback_path
       end
+
+      def raw_info
+        return @raw_info unless @raw_info.nil?
+
+        res = access_token.get('/v2/users/me')
+        @raw_info = JSON.parse(res.body, symbolize_names: true)
+      rescue StandardError => e
+        logger = OmniAuth.config.logger
+        logger&.debug("#{self.class}.#{__method__} #{e.class} occured. message:#{e.message}")
+        @raw_info = {}
+      end
     end
   end
 end
diff --git a/omniauth-zoom.gemspec b/omniauth-zoom.gemspec
index 9c75a1f..5e9c63f 100644
--- a/omniauth-zoom.gemspec
+++ b/omniauth-zoom.gemspec
@@ -28,6 +28,7 @@ Gem::Specification.new do |spec|
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ['lib']
 
+  spec.add_runtime_dependency 'oauth2', '~> 1.4.4'
   spec.add_runtime_dependency 'omniauth-oauth2', '~> 1.6.0'
 
   spec.add_development_dependency 'bundler', '~> 2.1'
diff --git a/test/omniauth/zoom_test.rb b/test/omniauth/zoom_test.rb
index d8fe13d..288b858 100644
--- a/test/omniauth/zoom_test.rb
+++ b/test/omniauth/zoom_test.rb
@@ -1,8 +1,9 @@
-require "test_helper"
+# frozen_string_literal: true
+
+require 'test_helper'
 
 class Omniauth::ZoomTest < Minitest::Test
   def test_that_it_has_a_version_number
     refute_nil ::Omniauth::Zoom::VERSION
   end
-
 end
diff --git a/test/test_helper.rb b/test/test_helper.rb
index 48f4fbf..b107710 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -1,5 +1,6 @@
+# frozen_string_literal: true
 
-$LOAD_PATH.unshift File.expand_path("../lib", __dir__)
+$LOAD_PATH.unshift File.expand_path('../lib', __dir__)
 
 require 'simplecov'
 SimpleCov.start