diff --git a/.travis.yml b/.travis.yml
index 540343a..6a5f092 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,4 @@
 language: ruby
-sudo: false
 
 script: bundle exec rake ci
 
@@ -7,11 +6,10 @@ notifications:
   email: false
 
 rvm:
-  - 2.3.0
+  - 2.5.3
 
 env:
   global:
     - NOKOGIRI_USE_SYSTEM_LIBRARIES=true
 
-before_script:
-  - jdk_switcher use oraclejdk8
\ No newline at end of file
+jdk: openjdk11
diff --git a/Gemfile b/Gemfile
index 789152f..8548f6c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -17,7 +17,7 @@ gem 'coveralls', require: false
 # gem 'byebug', group: [:development, :test]
 
 # BEGIN ENGINE_CART BLOCK
-# engine_cart: 1.0.1
+# engine_cart: 2.3.0
 # engine_cart stanza: 0.10.0
 # the below comes from engine_cart, a gem used to test this Rails engine gem in the context of a Rails app.
 file = File.expand_path('Gemfile', ENV['ENGINE_CART_DESTINATION'] || ENV['RAILS_ROOT'] || File.expand_path('.internal_test_app', File.dirname(__FILE__)))
@@ -39,14 +39,9 @@ else
       gem 'rails', ENV['RAILS_VERSION']
     end
   end
-
-  case ENV['RAILS_VERSION']
-  when /^4.2/
-    gem 'responders', '~> 2.0'
-    gem 'sass-rails', '>= 5.0'
-    gem 'coffee-rails', '~> 4.1.0'
-  when /^4.[01]/
-    gem 'sass-rails', '< 5.0'
-  end
 end
 # END ENGINE_CART BLOCK
+
+unless File.exist?(file)
+  eval_gemfile File.expand_path('spec/test_app_templates/Gemfile.extra', File.dirname(__FILE__))
+end
diff --git a/Rakefile b/Rakefile
index b74614f..6c85ae2 100644
--- a/Rakefile
+++ b/Rakefile
@@ -10,4 +10,4 @@ load 'tasks/blacklight_heatmaps.rake'
 
 require 'engine_cart/rake_task'
 
-task default: :spec
+task default: [:ci]
diff --git a/blacklight_heatmaps.gemspec b/blacklight_heatmaps.gemspec
index 29df3cd..96bd15a 100644
--- a/blacklight_heatmaps.gemspec
+++ b/blacklight_heatmaps.gemspec
@@ -24,8 +24,8 @@ Gem::Specification.new do |s|
 
   s.add_development_dependency 'sqlite3'
   s.add_development_dependency 'rspec-rails', '~> 3.4'
-  s.add_development_dependency 'engine_cart', '~> 1.0'
+  s.add_development_dependency 'engine_cart', '~> 2.0'
   s.add_development_dependency 'solr_wrapper'
   s.add_development_dependency 'capybara'
-  s.add_development_dependency 'poltergeist'
+  s.add_development_dependency 'webdrivers'
 end
diff --git a/solr/conf/schema.xml b/solr/conf/schema.xml
index 6fb1196..caa0a51 100644
--- a/solr/conf/schema.xml
+++ b/solr/conf/schema.xml
@@ -308,7 +308,6 @@
       <analyzer>
         <tokenizer class="solr.StandardTokenizerFactory"/>
         <filter class="solr.StopFilterFactory" ignoreCase="true" words="stopwords.txt"/>
-        <filter class="solr.StandardFilterFactory"/>
         <filter class="solr.LowerCaseFilterFactory"/>
         <filter class="solr.RemoveDuplicatesTokenFilterFactory"/>
       </analyzer>
@@ -317,7 +316,6 @@
     <fieldType class="solr.TextField" name="textSuggest" positionIncrementGap="100">
        <analyzer>
           <tokenizer class="solr.KeywordTokenizerFactory"/>
-          <filter class="solr.StandardFilterFactory"/>
           <filter class="solr.LowerCaseFilterFactory"/>
           <filter class="solr.RemoveDuplicatesTokenFilterFactory"/>
        </analyzer>
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 0a72b99..fc726fd 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -17,8 +17,9 @@
 
 Dir[Pathname.new(File.expand_path("../support/**/*.rb", __FILE__))].each { |f| require f }
 
-require 'capybara/poltergeist'
-Capybara.javascript_driver = :poltergeist
+require 'webdrivers/chromedriver'
+
+Capybara.javascript_driver = :selenium_chrome_headless
 
 require 'blacklight'
 require 'blacklight_heatmaps'
diff --git a/spec/test_app_templates/Gemfile.extra b/spec/test_app_templates/Gemfile.extra
new file mode 100644
index 0000000..b62b467
--- /dev/null
+++ b/spec/test_app_templates/Gemfile.extra
@@ -0,0 +1 @@
+gem 'sprockets', '< 4'
diff --git a/tasks/blacklight_heatmaps.rake b/tasks/blacklight_heatmaps.rake
index caea922..3168f4a 100644
--- a/tasks/blacklight_heatmaps.rake
+++ b/tasks/blacklight_heatmaps.rake
@@ -3,13 +3,7 @@
 require 'solr_wrapper'
 require 'engine_cart/rake_task'
 require 'rspec/core/rake_task'
-
-desc 'Run specs'
-RSpec::Core::RakeTask.new do |t|
-end
-
-
-EngineCart.fingerprint_proc = EngineCart.rails_fingerprint_proc
+RSpec::Core::RakeTask.new(:spec)
 
 desc 'Run test suite'
 task ci: ['blacklight_heatmaps:generate'] do
diff --git a/vendor/assets/javascripts/leaflet_solr_heatmap.js b/vendor/assets/javascripts/leaflet_solr_heatmap.js
index 96b7b79..9e6451c 100644
--- a/vendor/assets/javascripts/leaflet_solr_heatmap.js
+++ b/vendor/assets/javascripts/leaflet_solr_heatmap.js
@@ -28,20 +28,7 @@ L.SolrHeatmap = L.GeoJSON.extend({
 
   _computeHeatmapObject: function (data) {
     var _this = this;
-    _this.facetHeatmap = {},
-      facetHeatmapArray = data.response.facet_heatmaps[this.options.field];
-
-    // Convert array to an object
-    $.each(facetHeatmapArray, function (index, value) {
-      if ((index + 1) % 2 !== 0) {
-        // Set object keys for even items
-        _this.facetHeatmap[value] = '';
-      }else {
-        // Set object values for odd items
-        _this.facetHeatmap[facetHeatmapArray[index - 1]] = value;
-      }
-    });
-
+    _this.facetHeatmap = data.response.facet_heatmaps[this.options.field];
     this._computeIntArrays();
   },