diff --git a/lib/survey-gizmo-ruby.rb b/lib/survey-gizmo-ruby.rb
index 7bd253d..1c8561f 100644
--- a/lib/survey-gizmo-ruby.rb
+++ b/lib/survey-gizmo-ruby.rb
@@ -17,4 +17,5 @@
 
 path = File.join(File.expand_path(File.dirname(__FILE__)), 'survey_gizmo')
 Dir["#{path}/*.rb"].each { |f| require f }
-Dir["#{path}/**/*.rb"].each { |f| require f }
+Dir["#{path}/v4/*.rb"].each { |f| require f }
+Dir["#{path}/v5/*.rb"].each { |f| require f }
diff --git a/lib/survey_gizmo/api/api.rb b/lib/survey_gizmo/api/api.rb
new file mode 100644
index 0000000..425ad70
--- /dev/null
+++ b/lib/survey_gizmo/api/api.rb
@@ -0,0 +1,7 @@
+module SurveyGizmo::API
+  if SurveyGizmo.configuration.v5?
+    include SurveyGizmo::V5
+  else
+    include SurveyGizmo::V4
+  end
+end
diff --git a/lib/survey_gizmo/configuration.rb b/lib/survey_gizmo/configuration.rb
index d6f330e..085cbe0 100644
--- a/lib/survey_gizmo/configuration.rb
+++ b/lib/survey_gizmo/configuration.rb
@@ -32,6 +32,10 @@ def configure
       configuration.retriable_params = Configuration::DEFAULT_RETRIABLE_PARAMS.merge(configuration.retriable_params)
 
       @global_config = configuration
+
+      path = File.expand_path(File.dirname(__FILE__))
+      require File.join(path, 'api/api')
+      configuration
     end
 
     def reset!
@@ -41,7 +45,7 @@ def reset!
   end
 
   class Configuration
-    DEFAULT_API_VERSION = 'v4'
+    DEFAULT_API_VERSION = 'v5'
     DEFAULT_RESULTS_PER_PAGE = 50
     DEFAULT_TIMEOUT_SECONDS = 300
     DEFAULT_REGION = :us
@@ -113,5 +117,9 @@ def region=(region)
       @api_url = region_infos[:url]
       @api_time_zone = region_infos[:locale]
     end
+
+    def v5?
+      api_version == 'v5'
+    end
   end
 end
diff --git a/lib/survey_gizmo/faraday_middleware/parse_survey_gizmo.rb b/lib/survey_gizmo/faraday_middleware/parse_survey_gizmo.rb
index ee65c7b..69866e3 100644
--- a/lib/survey_gizmo/faraday_middleware/parse_survey_gizmo.rb
+++ b/lib/survey_gizmo/faraday_middleware/parse_survey_gizmo.rb
@@ -19,6 +19,9 @@ class ParseSurveyGizmo < FaradayMiddleware::ResponseMiddleware
       'datecreated',
       'datemodified',
       'datesubmitted',
+      'date_created',
+      'date_modified',
+      'date_submitted',
       'modified_on'
     ]
 
diff --git a/lib/survey_gizmo/api/account_teams.rb b/lib/survey_gizmo/v4/account_teams.rb
similarity index 94%
rename from lib/survey_gizmo/api/account_teams.rb
rename to lib/survey_gizmo/v4/account_teams.rb
index 32e73c6..d85a483 100644
--- a/lib/survey_gizmo/api/account_teams.rb
+++ b/lib/survey_gizmo/v4/account_teams.rb
@@ -1,7 +1,7 @@
 # This REST endpoint is only available to accounts with admin privileges
 # This code is untested.
 
-module SurveyGizmo::API
+module SurveyGizmo::V4
   class AccountTeams
     include SurveyGizmo::Resource
 
diff --git a/lib/survey_gizmo/api/answer.rb b/lib/survey_gizmo/v4/answer.rb
similarity index 98%
rename from lib/survey_gizmo/api/answer.rb
rename to lib/survey_gizmo/v4/answer.rb
index ed52e13..ad25f64 100644
--- a/lib/survey_gizmo/api/answer.rb
+++ b/lib/survey_gizmo/v4/answer.rb
@@ -1,4 +1,4 @@
-module SurveyGizmo::API
+module SurveyGizmo::V4
   class Answer
     include Virtus.model
 
diff --git a/lib/survey_gizmo/api/campaign.rb b/lib/survey_gizmo/v4/campaign.rb
similarity index 97%
rename from lib/survey_gizmo/api/campaign.rb
rename to lib/survey_gizmo/v4/campaign.rb
index b54072e..81a6d09 100644
--- a/lib/survey_gizmo/api/campaign.rb
+++ b/lib/survey_gizmo/v4/campaign.rb
@@ -1,4 +1,4 @@
-module SurveyGizmo::API
+module SurveyGizmo::V4
   class Campaign
     include SurveyGizmo::Resource
 
diff --git a/lib/survey_gizmo/api/contact.rb b/lib/survey_gizmo/v4/contact.rb
similarity index 98%
rename from lib/survey_gizmo/api/contact.rb
rename to lib/survey_gizmo/v4/contact.rb
index 977c290..87d6c0a 100644
--- a/lib/survey_gizmo/api/contact.rb
+++ b/lib/survey_gizmo/v4/contact.rb
@@ -1,4 +1,4 @@
-module SurveyGizmo::API
+module SurveyGizmo::V4
   class Contact
     include SurveyGizmo::Resource
 
diff --git a/lib/survey_gizmo/api/email_message.rb b/lib/survey_gizmo/v4/email_message.rb
similarity index 97%
rename from lib/survey_gizmo/api/email_message.rb
rename to lib/survey_gizmo/v4/email_message.rb
index 27cb17c..424ee32 100644
--- a/lib/survey_gizmo/api/email_message.rb
+++ b/lib/survey_gizmo/v4/email_message.rb
@@ -1,4 +1,4 @@
-module SurveyGizmo::API
+module SurveyGizmo::V4
   class EmailMessage
     include SurveyGizmo::Resource
 
diff --git a/lib/survey_gizmo/api/option.rb b/lib/survey_gizmo/v4/option.rb
similarity index 94%
rename from lib/survey_gizmo/api/option.rb
rename to lib/survey_gizmo/v4/option.rb
index 6d270fb..89aca8e 100644
--- a/lib/survey_gizmo/api/option.rb
+++ b/lib/survey_gizmo/v4/option.rb
@@ -1,4 +1,4 @@
-module SurveyGizmo::API
+module SurveyGizmo::V4
   class Option
     include SurveyGizmo::Resource
     include SurveyGizmo::MultilingualTitle
diff --git a/lib/survey_gizmo/api/page.rb b/lib/survey_gizmo/v4/page.rb
similarity index 94%
rename from lib/survey_gizmo/api/page.rb
rename to lib/survey_gizmo/v4/page.rb
index 304bb4b..3f0cbb0 100644
--- a/lib/survey_gizmo/api/page.rb
+++ b/lib/survey_gizmo/v4/page.rb
@@ -1,6 +1,6 @@
-require 'survey_gizmo/api/question'
+require 'survey_gizmo/v4/question'
 
-module SurveyGizmo::API
+module SurveyGizmo::V4
   class Page
     include SurveyGizmo::Resource
     include SurveyGizmo::MultilingualTitle
diff --git a/lib/survey_gizmo/api/question.rb b/lib/survey_gizmo/v4/question.rb
similarity index 97%
rename from lib/survey_gizmo/api/question.rb
rename to lib/survey_gizmo/v4/question.rb
index 1a2b137..b622187 100644
--- a/lib/survey_gizmo/api/question.rb
+++ b/lib/survey_gizmo/v4/question.rb
@@ -1,6 +1,6 @@
-require 'survey_gizmo/api/option'
+require 'survey_gizmo/v4/option'
 
-module SurveyGizmo::API
+module SurveyGizmo::V4
   class Question
     include SurveyGizmo::Resource
     include SurveyGizmo::MultilingualTitle
diff --git a/lib/survey_gizmo/api/response.rb b/lib/survey_gizmo/v4/response.rb
similarity index 98%
rename from lib/survey_gizmo/api/response.rb
rename to lib/survey_gizmo/v4/response.rb
index f4bc614..4fdf9e7 100644
--- a/lib/survey_gizmo/api/response.rb
+++ b/lib/survey_gizmo/v4/response.rb
@@ -1,4 +1,4 @@
-module SurveyGizmo::API
+module SurveyGizmo::V4
   class Response
     include SurveyGizmo::Resource
 
diff --git a/lib/survey_gizmo/api/survey.rb b/lib/survey_gizmo/v4/survey.rb
similarity index 98%
rename from lib/survey_gizmo/api/survey.rb
rename to lib/survey_gizmo/v4/survey.rb
index f43a647..17dc4b2 100644
--- a/lib/survey_gizmo/api/survey.rb
+++ b/lib/survey_gizmo/v4/survey.rb
@@ -1,6 +1,6 @@
-require 'survey_gizmo/api/page'
+require 'survey_gizmo/v4/page'
 
-module SurveyGizmo::API
+module SurveyGizmo::V4
   class Survey
     include SurveyGizmo::Resource
 
diff --git a/lib/survey_gizmo/v5/account_teams.rb b/lib/survey_gizmo/v5/account_teams.rb
new file mode 100644
index 0000000..ce6c961
--- /dev/null
+++ b/lib/survey_gizmo/v5/account_teams.rb
@@ -0,0 +1,18 @@
+# This REST endpoint is only available to accounts with admin privileges
+# This code is untested.
+
+module SurveyGizmo::V5
+  class AccountTeams
+    include SurveyGizmo::Resource
+
+    attribute :id,            Integer
+    attribute :default_role,  String
+    attribute :status,        String
+
+    # v5 fields
+    attribute :team_name,      String
+    attribute :description,   String
+
+    @route = '/accountteams'
+  end
+end
diff --git a/lib/survey_gizmo/v5/answer.rb b/lib/survey_gizmo/v5/answer.rb
new file mode 100644
index 0000000..d7b0fb6
--- /dev/null
+++ b/lib/survey_gizmo/v5/answer.rb
@@ -0,0 +1,72 @@
+require 'survey_gizmo/v5/option'
+
+module SurveyGizmo::V5
+  class Answer
+    include Virtus.model
+
+    attribute :key,           String
+    attribute :value,         String
+    attribute :survey_id,     Integer
+    attribute :response_id,   Integer
+    attribute :question_id,   Integer
+    attribute :question_text, String
+    attribute :question_type, String
+    attribute :options,       Array[Option]
+    attribute :submitted_at,  DateTime
+    attribute :answer_text,   String
+    attribute :other_text,    String
+    attribute :question_pipe, String
+
+    def initialize(attrs = {})
+      self.attributes = attrs
+      self.question_id = value['id']
+      self.question_text = value['question']
+      self.question_type = value['type']
+
+      if value['options']
+        self.answer_text = selected_options_texts.join(', ')
+      else
+        self.answer_text = value['answer']
+      end
+    end
+
+    def single_option
+      [
+        Option.new(attributes.merge(
+          id: value['answer_id'],
+          value: value['answer'],
+          title: value['original_answer'] || value['answer']
+        ))
+      ]
+    end
+
+    def selected_options_texts
+      selected_options.map do |opt|
+        opt['answer']
+      end
+    end
+
+    def selected_options
+      value['options'].values.reject { |opt| opt['answer'].nil? }.map do |opt|
+        Option.new(attributes.merge(
+          id: opt['id'],
+          value: opt['answer'],
+          title: opt['option']
+        ))
+      end
+    end
+
+    # Strips out the answer_text when there is a valid option_id
+    def to_hash
+      {
+        response_id: response_id,
+        question_id: question_id,
+        question_pipe: question_pipe,
+        submitted_at: submitted_at,
+        survey_id: survey_id,
+        other_text: other_text,
+        answer_text: other_text ? nil : answer_text
+      }.reject { |k, v| v.nil? }
+    end
+  end
+end
diff --git a/lib/survey_gizmo/v5/campaign.rb b/lib/survey_gizmo/v5/campaign.rb
new file mode 100644
index 0000000..8b78e27
--- /dev/null
+++ b/lib/survey_gizmo/v5/campaign.rb
@@ -0,0 +1,32 @@
+module SurveyGizmo::V5
+  class Campaign
+    include SurveyGizmo::Resource
+
+    attribute :id,              Integer
+    attribute :name,            String
+    attribute :type,            String
+    attribute :status,          String
+    attribute :uri,             String
+    attribute :SSL,             Boolean
+    attribute :language,        String
+    attribute :close_message,   String
+    attribute :limit_responses, String
+    attribute :survey_id,       Integer
+
+    # v5 fields
+    attribute :token_variables,  Array
+    attribute :invite_id,       Integer
+    attribute :subtype,         String
+    attribute :link_type,       String
+    attribute :date_created,    DateTime
+    attribute :date_modified,   DateTime
+    attribute :link_open_date,  DateTime
+    attribute :link_close_date, DateTime
+
+    @route = '/survey/:survey_id/surveycampaign'
+
+    def contacts(conditions = {})
+      Contact.all(conditions.merge(children_params).merge(all_pages: !conditions[:page]))
+    end
+  end
+end
diff --git a/lib/survey_gizmo/v5/contact.rb b/lib/survey_gizmo/v5/contact.rb
new file mode 100644
index 0000000..d36500d
--- /dev/null
+++ b/lib/survey_gizmo/v5/contact.rb
@@ -0,0 +1,46 @@
+module SurveyGizmo::V5
+  class Contact
+    include SurveyGizmo::Resource
+
+    attribute :id,                      Integer
+    attribute :survey_id,               Integer
+    attribute :campaign_id,             Integer
+
+    # v5 fields
+    attribute :date_last_sent,          DateTime
+    attribute :division,                String
+    attribute :team,                    String
+    attribute :group,                   String
+    attribute :role,                    String
+    attribute :status,                  String
+    attribute :subscriber_status,       String
+    attribute :email_address,           String
+    attribute :first_name,              String
+    attribute :last_name,               String
+    attribute :organization,            String
+    attribute :department,              String
+    attribute :business_phone,          String
+    attribute :home_phone,              String
+    attribute :fax_phone,               String
+    attribute :mailing_address,         String
+    attribute :mailing_address2,        String
+    attribute :mailing_address_city,    String
+    attribute :mailing_address_state,   String
+    attribute :mailing_address_country, String
+    attribute :mailing_address_postal,  String
+    attribute :title,                   String
+    attribute :url,                     String
+    attribute :customfield1,            String
+    attribute :customfield2,            String
+    attribute :customfield3,            String
+    attribute :customfield4,            String
+    attribute :customfield5,            String
+    attribute :customfield6,            String
+    attribute :customfield7,            String
+    attribute :customfield8,            String
+    attribute :customfield9,            String
+    attribute :customfield10,           String
+
+    @route = '/survey/:survey_id/surveycampaign/:campaign_id/contact'
+  end
+end
diff --git a/lib/survey_gizmo/v5/email_message.rb b/lib/survey_gizmo/v5/email_message.rb
new file mode 100644
index 0000000..c645d91
--- /dev/null
+++ b/lib/survey_gizmo/v5/email_message.rb
@@ -0,0 +1,29 @@
+module SurveyGizmo::V5
+  class EmailMessage
+    include SurveyGizmo::Resource
+
+    attribute :id,                Integer
+    attribute :survey_id,         Integer
+    attribute :campaign_id,       Integer
+    attribute :invite_identity,   Integer
+    attribute :subject,           String
+    attribute :replies,           String
+    attribute :medium,            String
+    attribute :status,            String
+    attribute :from,              Hash
+    attribute :body,              Hash
+    attribute :send,              Boolean
+
+    # v5 fields
+    attribute :type,              String
+    attribute :subtype,           String
+    attribute :message_type,       String
+    attribute :footer,            String
+    attribute :embed_question,    Boolean
+    attribute :disable_styles,    Boolean
+    attribute :date_created,      DateTime
+    attribute :date_modified,     DateTime
+
+    @route = '/survey/:survey_id/surveycampaign/:campaign_id/emailmessage'
+  end
+end
diff --git a/lib/survey_gizmo/v5/option.rb b/lib/survey_gizmo/v5/option.rb
new file mode 100644
index 0000000..142445b
--- /dev/null
+++ b/lib/survey_gizmo/v5/option.rb
@@ -0,0 +1,18 @@
+module SurveyGizmo::V5
+  class Option
+    include SurveyGizmo::Resource
+    include SurveyGizmo::MultilingualTitle
+
+    attribute :id,            Integer
+    attribute :survey_id,     Integer
+    attribute :page_id,       Integer
+    attribute :question_id,   Integer
+    attribute :value,         String
+    attribute :properties,    Hash
+
+    # v5 fields
+    attribute :title,       String
+
+    @route = '/survey/:survey_id/surveypage/:page_id/surveyquestion/:question_id/surveyoption'
+  end
+end
diff --git a/lib/survey_gizmo/v5/page.rb b/lib/survey_gizmo/v5/page.rb
new file mode 100644
index 0000000..3025fce
--- /dev/null
+++ b/lib/survey_gizmo/v5/page.rb
@@ -0,0 +1,27 @@
+require 'survey_gizmo/v5/question'
+
+module SurveyGizmo::V5
+  class Page
+    include SurveyGizmo::Resource
+    include SurveyGizmo::MultilingualTitle
+
+    attribute :id,            Integer
+    attribute :description,   String
+    attribute :properties,    Hash
+    attribute :survey_id,     Integer
+    attribute :questions,     Array[Question]
+
+    # v5 fields
+    attribute :title,       String
+
+    @route = '/survey/:survey_id/surveypage'
+
+    def survey
+      @survey ||= Survey.first(id: survey_id)
+    end
+
+    def questions
+      @questions.each { |q| q.attributes = children_params }
+    end
+  end
+end
diff --git a/lib/survey_gizmo/v5/question.rb b/lib/survey_gizmo/v5/question.rb
new file mode 100644
index 0000000..fabf206
--- /dev/null
+++ b/lib/survey_gizmo/v5/question.rb
@@ -0,0 +1,50 @@
+require 'survey_gizmo/v5/option'
+
+module SurveyGizmo::V5
+  class Question
+    include SurveyGizmo::Resource
+    include SurveyGizmo::MultilingualTitle
+
+    attribute :id,                 Integer
+    attribute :type,               String
+    attribute :description,        String
+    attribute :shortname,          String
+    attribute :properties,         Hash
+    attribute :options,            Array[Option]
+    attribute :survey_id,          Integer
+    attribute :page_id,            Integer, default: 1
+    attribute :parent_question_id, Integer
+
+    # v5 fields
+    attribute :base_type,          String
+    attribute :subtype,            String
+    attribute :varname,            Array
+    attribute :has_showhide_deps,  Boolean
+    attribute :comment,            Boolean
+    attribute :sub_questions,      Array[Question]
+
+    @route = {
+      get:    '/survey/:survey_id/surveyquestion/:id',
+      create: '/survey/:survey_id/surveypage/:page_id/surveyquestion',
+      update: '/survey/:survey_id/surveypage/:page_id/surveyquestion/:id'
+    }
+    @route[:delete] = @route[:update]
+
+    def survey
+      @survey ||= Survey.first(id: survey_id)
+    end
+
+    def options
+      return parent_question.options.dup.each { |o| o.question_id = id } if parent_question
+
+      @options ||= Option.all(children_params.merge(all_pages: true)).to_a
+      @options.each { |o| o.attributes = children_params }
+    end
+
+    def parent_question
+      return nil unless parent_question_id
+
+      @parent_question ||= Question.first(survey_id: survey_id, id: parent_question_id)
+    end
+  end
+end
diff --git a/lib/survey_gizmo/v5/response.rb b/lib/survey_gizmo/v5/response.rb
new file mode 100644
index 0000000..95f7ae9
--- /dev/null
+++ b/lib/survey_gizmo/v5/response.rb
@@ -0,0 +1,63 @@
+module SurveyGizmo::V5
+  class Response
+    include SurveyGizmo::Resource
+
+    # Filters
+    NO_TEST_DATA =   { field: 'is_test_data', operator: '<>', value: 1 }
+    ONLY_COMPLETED = { field: 'status',     operator: '=',  value: 'Complete' }
+
+    def self.submitted_since_filter(time)
+      {
+        field: 'date_submitted',
+        operator: '>=',
+        value: time.in_time_zone(SurveyGizmo.configuration.api_time_zone).strftime('%Y-%m-%d %H:%M:%S')
+      }
+    end
+
+    attribute :id,                   Integer
+    attribute :survey_id,            Integer
+    attribute :contact_id,           Integer
+    attribute :status,               String
+    attribute :is_test_data,         Boolean
+    attribute :meta,                 Hash       # READ-ONLY
+    attribute :url,                  Hash       # READ-ONLY
+
+    # v5 fields
+    attribute :date_submitted,       DateTime
+    attribute :date_started,         DateTime
+    attribute :session_id,           String
+    attribute :language,             String
+    attribute :url_variables,        Hash
+    attribute :survey_data,          Hash
+    attribute :comment,              Hash
+    attribute :subquestions,         Hash
+    attribute :options,              Hash
+    attribute :link_id,              String
+    attribute :ip_address,           String
+    attribute :referer,              String
+    attribute :user_agent,           String
+    attribute :response_time,        Integer
+    attribute :data_quality,         Array
+    attribute :longitude,            String
+    attribute :latitude,             String
+    attribute :country,              String
+    attribute :city,                 String
+    attribute :region,               String
+    attribute :postal,               String
+    attribute :dma,                  Boolean
+    alias_attribute :submitted_at, :date_submitted
+    alias_attribute :answers, :survey_data
+
+    @route = '/survey/:survey_id/surveyresponse'
+
+    def survey
+      @survey ||= Survey.first(id: survey_id)
+    end
+
+    def parsed_answers
+      answers.map do |k, v|
+        Answer.new(children_params.merge(key: k, value: v, answer_text: v, submitted_at: submitted_at))
+      end
+    end
+  end
+end
diff --git a/lib/survey_gizmo/v5/survey.rb b/lib/survey_gizmo/v5/survey.rb
new file mode 100644
index 0000000..0144c13
--- /dev/null
+++ b/lib/survey_gizmo/v5/survey.rb
@@ -0,0 +1,91 @@
+require 'survey_gizmo/v5/page'
+
+module SurveyGizmo::V5
+  class Survey
+    include SurveyGizmo::Resource
+
+    attribute :id,             Integer
+    attribute :team,           Array
+    attribute :type,           String
+    attribute :status,         String
+    attribute :forward_only,   Boolean
+    attribute :title,          String
+    attribute :internal_title, String
+    attribute :title_ml,       Hash
+    attribute :links,          Hash
+    attribute :theme,          Integer
+    attribute :blockby,        String
+    attribute :languages,      Array
+    attribute :statistics,     Array
+    attribute :created_on,     DateTime
+    attribute :modified_on,    DateTime
+    # See comment in the #pages method for why this :pages can't be an attribute
+    # attribute :pages,          Array[Page]
+
+    @route = '/survey'
+
+    def pages
+      # SurveyGizmo sends down the page info to .first requests but NOT to .all requests, so we must load pages
+      # manually.  We should be able to just .reload this Survey BUT we can't make :pages a Virtus attribute without
+      # requiring a call to this method during Survey.save
+      @pages ||= Page.all(children_params.merge(all_pages: true)).to_a
+      @pages.each { |p| p.attributes = children_params }
+    end
+
+    # Sub question handling is in resource.rb and page.rb.  It should probably be here instead but if it gets moved
+    # here and people try to request all the questions for a specific page directly from a ::API::Question request or
+    # from Page.questions, sub questions will not be included!  So I left it there for least astonishment.
+    def questions
+      @questions ||= pages.flat_map { |p| p.questions }
+    end
+
+    def actual_questions
+      questions.select do |q|
+        q.base_type == 'Question' || q.base_type == 'SurveyQuestion'
+      end
+    end
+
+    def responses(conditions = {})
+      Response.all(conditions.merge(children_params).merge(all_pages: !conditions[:page]))
+    end
+
+    # Statistics array of arrays looks like:
+    # [["Partial", 2], ["Disqualified", 28], ["Complete", 15]]
+    def number_of_completed_responses
+      if statistics && !statistics.empty? && (completed_data = statistics.find { |a| a[0] == 'Complete' })
+        completed_data[1]
+      else
+        0
+      end
+    end
+
+    def server_has_new_results_since?(time, filters = [])
+      Response.all(
+        children_params.merge(
+          page: 1,
+          resultsperpage: 1,
+          filters: filters + [Response.submitted_since_filter(time)]
+        )
+      ).to_a.size > 0
+    end
+
+    # As of 2015-12-18, when you request data on multiple surveys from /survey, the team variable comes
+    # back as "0".  If you request one survey at a time from /survey/{id}, it is populated correctly.
+    def teams
+      @individual_survey ||= self.reload
+      @individual_survey.team
+    end
+
+    def team_names
+      teams.map { |t| t['name'] }
+    end
+
+    def belongs_to?(team)
+      team_names.any? { |t| t == team }
+    end
+
+    def campaigns
+      @campaigns ||= Campaign.all(children_params.merge(all_pages: true)).to_a
+    end
+  end
+end
diff --git a/spec/configuration_spec.rb b/spec/configuration_spec.rb
index 65efd60..9652813 100644
--- a/spec/configuration_spec.rb
+++ b/spec/configuration_spec.rb
@@ -5,6 +5,7 @@
 
   let(:api_token) { "token" }
   let(:api_token_secret) { "doken" }
+  let(:test_api_version) { 'v4' }
 
   before(:each) do
     SurveyGizmo.configure do |config|
diff --git a/spec/logger_spec.rb b/spec/logger_spec.rb
index 0c00333..76194c3 100644
--- a/spec/logger_spec.rb
+++ b/spec/logger_spec.rb
@@ -4,6 +4,7 @@
   let(:progname)    { 'TEST' }
   let(:severity)    { 'INFO' }
   let(:time_string) { '2015-04-15 05:46:30' }
+  let(:test_api_version) { 'v4' }
 
   before(:each) do
     SurveyGizmo.configure do |config|
diff --git a/spec/resource_spec.rb b/spec/resource_spec.rb
index 5d7986f..6ca28de 100644
--- a/spec/resource_spec.rb
+++ b/spec/resource_spec.rb
@@ -3,6 +3,7 @@
 describe 'Survey Gizmo Resource' do
   let(:create_attributes_to_compare) { }
   let(:get_attributes_to_compare) { }
+  let(:test_api_version) { 'v4' }
 
   describe SurveyGizmo::Resource do
     let(:described_class)   { SurveyGizmoSpec::ResourceTest }
@@ -50,7 +51,7 @@
     end
   end
 
-  describe SurveyGizmo::API::Survey do
+  describe SurveyGizmo::V4::Survey do
     let(:create_attributes) { { title: 'Spec', type: 'survey', status: 'In Design' } }
     let(:get_attributes)    { create_attributes.merge(first_params) }
     let(:update_attributes) { { title: 'Updated'} }
@@ -78,7 +79,7 @@
     end
   end
 
-  describe SurveyGizmo::API::Question do
+  describe SurveyGizmo::V4::Question do
     let(:base_params)       { {survey_id: 1234, page_id: 1} }
     let(:create_attributes) { base_params.merge(title: 'Spec Question', type: 'radio', properties: { 'required' => true, 'option_sort' => false }) }
     let(:update_attributes) { base_params.merge(title: 'Updated') }
@@ -190,7 +191,7 @@
     end
   end
 
-  describe SurveyGizmo::API::Option do
+  describe SurveyGizmo::V4::Option do
     let(:survey_and_page)   { {survey_id: 1234, page_id: 1} }
     let(:create_attributes) { survey_and_page.merge(question_id: 1, title: 'Spec Question', value: 'Spec Answer') }
     let(:update_attributes) { survey_and_page.merge(question_id: 1, title: 'Updated') }
@@ -206,7 +207,7 @@
     it_should_behave_like 'an object with errors'
   end
 
-  describe SurveyGizmo::API::Page do
+  describe SurveyGizmo::V4::Page do
     let(:create_attributes) { {:survey_id => 1234, :title => 'Spec Page' } }
     let(:get_attributes)    { create_attributes.merge(:id => 1) }
     let(:update_attributes) { {:survey_id => 1234, :title => 'Updated'} }
@@ -221,7 +222,7 @@
     it_should_behave_like 'an object with errors'
   end
 
-  describe SurveyGizmo::API::Response do
+  describe SurveyGizmo::V4::Response do
     let(:create_attributes) { {:survey_id => 1234, :datesubmitted => "2015-04-15 05:46:30" } }
     let(:create_attributes_to_compare) { create_attributes.merge(:datesubmitted => Time.parse("2015-04-15 05:46:30 -0400")) }
     let(:get_attributes)    { create_attributes.merge(:id => 1) }
@@ -295,7 +296,7 @@
     end
   end
 
-  describe SurveyGizmo::API::AccountTeams do
+  describe SurveyGizmo::V4::AccountTeams do
     pending('Need an account with admin privileges to test this')
     let(:create_attributes) { { teamid: 1234, teamname: 'team' } }
     let(:get_attributes)    { create_attributes.merge(id: 1234) }
diff --git a/spec/resource_v5_spec.rb b/spec/resource_v5_spec.rb
new file mode 100644
index 0000000..8cd0812
--- /dev/null
+++ b/spec/resource_v5_spec.rb
@@ -0,0 +1,301 @@
+require 'spec_helper'
+
+describe 'Survey Gizmo Resource V5' do
+  let(:create_attributes_to_compare) { }
+  let(:get_attributes_to_compare) { }
+  let(:test_api_version) { 'v5' }
+
+  describe SurveyGizmo::Resource do
+    let(:described_class)   { SurveyGizmoSpec::ResourceTest }
+    let(:create_attributes) { { title: 'Spec', test_id: 5 } }
+    let(:update_attributes) { { title: 'Updated' } }
+    let(:first_params)      { { id: 1, test_id: 5 } }
+    let(:get_attributes)    { create_attributes.merge(id: 1) }
+    let(:uri_paths){
+      {
+        get:    '/test/1',
+        create: '/test/5/resource',
+        update: '/test/5/resource/1',
+        delete: '/test/5/resource/1'
+      }
+    }
+
+    it '#reload' do
+      stub_request(:get, /#{@base}/).to_return(json_response(true, get_attributes))
+      obj = described_class.new(get_attributes.merge(update_attributes))
+      expect(obj.attributes.reject { |k, v| v.blank? }).to eq(get_attributes.merge(update_attributes))
+      obj.reload
+      expect(obj.attributes.reject { |k, v| v.blank? }).to eq(get_attributes)
+    end
+
+    it 'should raise an error if params are missing' do
+      expect(lambda {
+        SurveyGizmoSpec::ResourceTest.destroy(test_id: 5)
+      }).to raise_error(SurveyGizmo::URLError, 'Missing RESTful parameters in request: `:id`')
+    end
+
+    it_should_behave_like 'an API object'
+    it_should_behave_like 'an object with errors'
+
+    context '#filters_to_query_string' do
+      let(:page)    { 2 }
+      let(:filters) { { page: page, filters: [{ field: 'istestdata', operator: '<>', value: 1 }] } }
+
+      it 'should generate the correct page request' do
+        expect(SurveyGizmoSpec::ResourceTest.send(:filters_to_query_string, { page: page })).to eq("?page=#{page}")
+      end
+
+      it 'should generate the correct filter fragment' do
+        expect(SurveyGizmoSpec::ResourceTest.send(:filters_to_query_string, filters)).to eq("?filter%5Bfield%5D%5B0%5D=istestdata&filter%5Boperator%5D%5B0%5D=%3C%3E&filter%5Bvalue%5D%5B0%5D=1&page=#{page}")
+      end
+    end
+  end
+
+  describe SurveyGizmo::V5::Survey do
+    let(:create_attributes) { { title: 'Spec', type: 'survey', status: 'In Design' } }
+    let(:get_attributes)    { create_attributes.merge(first_params) }
+    let(:update_attributes) { { title: 'Updated'} }
+    let(:first_params)      { { id: 1234} }
+    let(:uri_paths){
+      h = { :create => '/survey' }
+      h.default = '/survey/1234'
+      h
+    }
+
+    it_should_behave_like 'an API object'
+    it_should_behave_like 'an object with errors'
+
+    it 'should parse the number of completed records correctly' do
+      survey = described_class.new('statistics' => [['Partial', 2], ['Disqualified', 28], ['Complete', 15]])
+      expect(survey.number_of_completed_responses).to eq(15)
+    end
+
+    it 'should determine if there are new results' do
+      stub_request(:get, /#{@base}\/survey\/1\/surveyresponse/).to_return(json_response(true, []))
+
+      survey = described_class.new(id: 1)
+      expect(survey.server_has_new_results_since?(Time.now)).to be_falsey
+      expect(a_request(:get, /#{@base}\/survey\/1\/surveyresponse/)).to have_been_made
+    end
+  end
+
+  describe SurveyGizmo::V5::Question do
+    let(:base_params)       { {survey_id: 1234, page_id: 1} }
+    let(:create_attributes) { base_params.merge(title: 'Spec Question', type: 'radio', properties: { 'required' => true, 'option_sort' => false }) }
+    let(:update_attributes) { base_params.merge(title: 'Updated') }
+    let(:first_params)      { base_params.merge(id: 1) }
+    let(:get_attributes)    { create_attributes.merge(id: 1).reject { |k, v| k == :properties } }
+    let(:uri_paths) {
+      { :get =>    '/survey/1234/surveyquestion/1',
+        :create => '/survey/1234/surveypage/1/surveyquestion',
+        :update => '/survey/1234/surveypage/1/surveyquestion/1',
+        :delete => '/survey/1234/surveypage/1/surveyquestion/1'
+      }
+    }
+
+    it_should_behave_like 'an API object'
+    it_should_behave_like 'an object with errors'
+
+    it 'should handle the title hash returned from the API' do
+      expect(described_class.new('title' => {'English' => 'Some title'}).title).to eq('Some title')
+    end
+
+    it 'should find the survey' do
+      stub_request(:get, /#{@base}\/survey\/1234/).to_return(json_response(true, get_attributes))
+      described_class.new(base_params).survey
+      expect(a_request(:get, /#{@base}\/survey\/1234/)).to have_been_made
+    end
+
+    context 'options' do
+      let(:survey_id) { 15 }
+      let(:question_id) { 23 }
+      let(:body_data) do
+        {
+          "id" => question_id,
+          "title" => {"English"=>"How likely are you to bang your head to Bohemian Rhapsody?"},
+          "options"=>
+             [
+               {
+                 "id" => 10014,
+                 "title" => {"English"=>"0 = Not at all likely"},
+                 "value" => "0 = Not at all likely"
+               },
+               {
+                 "id" => 10015,
+                 "title" => {"English"=>"1"},
+                 "value" => "1"
+               }
+             ]
+        }
+      end
+
+      context 'option parsing' do
+        before do
+          stub_request(:get, /#{@base}\/survey\/#{survey_id}\/surveyquestion\/#{question_id}/).to_return(json_response(true, body_data))
+        end
+
+        it 'correctly parses options out of question data' do
+          question = described_class.first(survey_id: survey_id, id: question_id)
+          expect(question.options.all? { |o| o.question_id == question_id && o.survey_id == survey_id }).to be_truthy
+          expect(question.options.map { |o| o.id }).to eq([10014, 10015])
+          expect(a_request(:get, /#{@base}\/.*surveyoption/)).to_not have_been_made
+        end
+
+        it 'correctly parses sub question options' do
+          question = described_class.new(survey_id: survey_id, id: question_id + 1, parent_question_id: question_id)
+          expect(question.parent_question.id).to eq(described_class.new(body_data).id)
+          expect(question.options.all? { |o| o.question_id == question.id && o.survey_id == survey_id }).to be_truthy
+          expect(question.options.map { |o| o.id }).to eq([10014, 10015])
+          expect(a_request(:get, /#{@base}\/survey\/#{survey_id}\/surveyquestion\/#{question_id}/)).to have_been_made
+        end
+      end
+    end
+
+    context 'subquestions' do
+      let(:parent_id) { 33 }
+      let(:subquestions) {
+        [
+          described_class.new(id: 544, survey_id: 1234, parent_question_id: parent_id),
+          described_class.new(id: 322, survey_id: 1234, parent_question_id: parent_id)
+        ]
+      }
+      let(:question_with_subquestions) { described_class.new(id: parent_id, survey_id: 1234, sub_questions: subquestions) }
+
+      it 'should have no subquestions' do
+        expect(described_class.new.sub_questions).to eq([])
+      end
+
+      it 'should have 2 subquestions and they should have the right parent question' do
+        stub_request(:get, /#{@base}/).to_return(json_response(true, get_attributes))
+        expect(question_with_subquestions.sub_questions.size).to eq(2)
+
+        question_with_subquestions.sub_questions.first.parent_question
+        question_with_subquestions.sub_questions.last.parent_question
+        expect(a_request(:get, /#{@base}\/survey\/1234\/surveyquestion\/#{parent_id}/)).to have_been_made.twice
+      end
+
+      context 'and shortname' do
+        let(:sku) { 6 }
+        let(:subquestions) {
+          [
+            described_class.new(id: 6, shortname: '0', survey_id: 1234, parent_question_id: parent_id),
+            described_class.new(id: 8, shortname: 'foo', survey_id: 1234, parent_question_id: parent_id)
+          ]
+        }
+        let(:question_with_subquestions) { described_class.new(id: parent_id, survey_id: 1234, sub_questions: subquestions) }
+
+        it 'should have 2 subquestions and they should have the right parent question' do
+          stub_request(:get, /#{@base}/).to_return(json_response(true, get_attributes))
+          expect(question_with_subquestions.sub_questions.size).to eq(2)
+
+          question_with_subquestions.sub_questions.first.parent_question
+          expect(a_request(:get, /#{@base}\/survey\/1234\/surveyquestion\/#{parent_id}/)).to have_been_made
+        end
+      end
+    end
+  end
+
+  describe SurveyGizmo::V5::Option do
+    let(:survey_and_page)   { {survey_id: 1234, page_id: 1} }
+    let(:create_attributes) { survey_and_page.merge(question_id: 1, title: 'Spec Question', value: 'Spec Answer') }
+    let(:update_attributes) { survey_and_page.merge(question_id: 1, title: 'Updated') }
+    let(:first_params)      { survey_and_page.merge(id: 1, question_id: 1) }
+    let(:get_attributes)    { create_attributes.merge(id: 1) }
+    let(:uri_paths) {
+      h = { :create => '/survey/1234/surveypage/1/surveyquestion/1/surveyoption' }
+      h.default = '/survey/1234/surveypage/1/surveyquestion/1/surveyoption/1'
+      h
+    }
+
+    it_should_behave_like 'an API object'
+    it_should_behave_like 'an object with errors'
+  end
+
+  describe SurveyGizmo::V5::Page do
+    let(:create_attributes) { {:survey_id => 1234, :title => 'Spec Page' } }
+    let(:get_attributes)    { create_attributes.merge(:id => 1) }
+    let(:update_attributes) { {:survey_id => 1234, :title => 'Updated'} }
+    let(:first_params)      { {:id => 1, :survey_id => 1234 } }
+    let(:uri_paths){
+      h = { :create => '/survey/1234/surveypage' }
+      h.default = '/survey/1234/surveypage/1'
+      h
+    }
+
+    it_should_behave_like 'an API object'
+    it_should_behave_like 'an object with errors'
+  end
+
+  describe SurveyGizmo::V5::Response do
+    # date_submitted is specified as DateTime, not Time
+    let(:create_attributes) { {:survey_id => 1234, :date_submitted => "2015-04-15 05:46:30 -0400" } }
+    let(:create_attributes_to_compare) { create_attributes.merge(:date_submitted => DateTime.parse("2015-04-15 05:46:30 -0400")) }
+    let(:get_attributes)    { create_attributes.merge(:id => 1) }
+    let(:get_attributes_to_compare)    { create_attributes_to_compare.merge(:id => 1) }
+    let(:update_attributes) { {:survey_id => 1234, :title => 'Updated'} }
+    let(:first_params)      { {:id => 1, :survey_id => 1234 } }
+    let(:uri_paths){
+      h = { :create => '/survey/1234/surveyresponse' }
+      h.default = '/survey/1234/surveyresponse/1'
+      h
+    }
+
+    it_should_behave_like 'an API object'
+    it_should_behave_like 'an object with errors'
+
+    context 'during EST' do
+      let(:create_attributes) { {:survey_id => 1234, :date_submitted => "2015-01-15 05:46:30 -0500" } }
+      let(:create_attributes_to_compare) { create_attributes.merge(:date_submitted => DateTime.parse("2015-01-15 05:46:30 -0500")) }
+
+      it_should_behave_like 'an API object'
+      it_should_behave_like 'an object with errors'
+    end
+
+    context 'answers' do
+      let(:survey_id) { 6 }
+      let(:response_id) { 7 }
+      let(:timestamp) { '2015-01-02'.to_time(:utc) }
+      let(:answers) do
+        {
+          5 => {
+            'id' => 5,
+            'type' => "TEXTBOX",
+            'shown' => true,
+            'answer' => 'VERY important'
+          },
+          6 => {
+            'id' => 6,
+            'type' => "TEXTBOX",
+            'shown' => false
+          }
+        }
+      end
+
+      it 'should propagate time, survey_id, and response_id' do
+        response = described_class.new(
+          answers: answers.select { |k, v| k == 5},
+          survey_id: survey_id,
+          id: response_id,
+          submitted_at: timestamp
+        )
+        expect(response.parsed_answers.map { |a| a.to_hash }).to eq([ { survey_id: survey_id, response_id: response_id, question_id: 5, answer_text: "VERY important", submitted_at: timestamp }])
+      end
+    end
+  end
+
+  describe SurveyGizmo::V5::AccountTeams do
+    pending('Need an account with admin privileges to test this')
+    let(:create_attributes) { { team_name: 'team' } }
+    let(:get_attributes)    { create_attributes.merge(id: 1234) }
+    let(:update_attributes) { get_attributes }
+    let(:first_params)      { get_attributes }
+    let(:uri_paths) do
+      h = { :create => '/accountteams' }
+      h.default = '/accountteams/1234'
+      h
+    end
+
+    it_should_behave_like 'an API object'
+    it_should_behave_like 'an object with errors'
+  end
+end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 3e64206..f60b11b 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -16,6 +16,7 @@
       config.api_token_secret = 'dreamword'
       config.retriable_params = { tries: 1, base_interval: 0 }
       config.logger.level = Logger::FATAL
+      config.api_version = test_api_version
     end
 
     @base = "#{SurveyGizmo.configuration.api_url}/#{SurveyGizmo.configuration.api_version}"