diff --git a/.gitignore b/.gitignore
index a955cfa..554a6d2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,3 +16,4 @@ test/tmp
 test/version_tmp
 tmp
 .DS_Store
+.vscode
diff --git a/lib/rack/tracker/facebook_pixel/facebook_pixel.rb b/lib/rack/tracker/facebook_pixel/facebook_pixel.rb
index f6015dd..671653a 100644
--- a/lib/rack/tracker/facebook_pixel/facebook_pixel.rb
+++ b/lib/rack/tracker/facebook_pixel/facebook_pixel.rb
@@ -7,6 +7,10 @@ def write
       options.present? ? type_to_json << options_to_json : type_to_json
     end
 
+    def with_event_id
+      ", {\"eventID\":\"#{event_id}\"}" if event_id.present?
+    end
+
     private
 
     def type_to_json
diff --git a/lib/rack/tracker/facebook_pixel/template/facebook_pixel.erb b/lib/rack/tracker/facebook_pixel/template/facebook_pixel.erb
index 2901c52..fd755d5 100644
--- a/lib/rack/tracker/facebook_pixel/template/facebook_pixel.erb
+++ b/lib/rack/tracker/facebook_pixel/template/facebook_pixel.erb
@@ -18,7 +18,7 @@
 <% if events.any? %>
   <script type="text/javascript">
     <% events.each do |event| %>
-      fbq("<%= event.name %>", <%= event.write %>);
+      fbq("<%= event.name %>", <%= event.write %><%= event.with_event_id %>);
     <% end %>
   </script>
 <% end %>
diff --git a/lib/rack/tracker/google_global/template/google_global.erb b/lib/rack/tracker/google_global/template/google_global.erb
index 9103419..9b74b21 100644
--- a/lib/rack/tracker/google_global/template/google_global.erb
+++ b/lib/rack/tracker/google_global/template/google_global.erb
@@ -1,5 +1,5 @@
 <% if trackers.any? %>
-<script async src='https://www.googletagmanager.com/gtag/js?id=<%= trackers[0][:id] %>'></script>
+<script async src='https://<%= options[:host].presence || 'www.googletagmanager.com' %>/gtag/js?id=<%= trackers[0][:id] %>'></script>
 <script>
   window.dataLayer = window.dataLayer || [];
   function gtag(){dataLayer.push(arguments)};
diff --git a/lib/rack/tracker/google_tag_manager/google_tag_manager.rb b/lib/rack/tracker/google_tag_manager/google_tag_manager.rb
index 1a05489..d3c6bc6 100644
--- a/lib/rack/tracker/google_tag_manager/google_tag_manager.rb
+++ b/lib/rack/tracker/google_tag_manager/google_tag_manager.rb
@@ -1,5 +1,4 @@
 class Rack::Tracker::GoogleTagManager < Rack::Tracker::Handler
-
   class Push < OpenStruct
     def write
       to_h.to_json
@@ -10,11 +9,11 @@ def inject(response)
     # Sub! is enough, in well formed html there's only one head or body tag.
     # Block syntax need to be used, otherwise backslashes in input will mess the output.
     # @see http://stackoverflow.com/a/4149087/518204 and https://github.com/railslove/rack-tracker/issues/50
-    response.sub! %r{<head.*?>} do |m|
-      m.to_s << self.render_head
+    response.sub!(/<head.*?>/) do |m|
+      m.to_s << render_head
     end
-    response.sub! %r{<body.*?>} do |m|
-      m.to_s << self.render_body
+    response.sub!(/<body.*?>/) do |m|
+      m.to_s << render_body
     end
     response
   end
@@ -24,10 +23,10 @@ def container
   end
 
   def render_head
-    Tilt.new( File.join( File.dirname(__FILE__), 'template', 'google_tag_manager_head.erb') ).render(self)
+    Tilt.new(File.join(File.dirname(__FILE__), 'template', 'google_tag_manager_head.erb')).render(self)
   end
 
   def render_body
-    Tilt.new( File.join( File.dirname(__FILE__), 'template', 'google_tag_manager_body.erb') ).render(self)
+    Tilt.new(File.join(File.dirname(__FILE__), 'template', 'google_tag_manager_body.erb')).render(self)
   end
 end
diff --git a/lib/rack/tracker/google_tag_manager/template/google_tag_manager_body.erb b/lib/rack/tracker/google_tag_manager/template/google_tag_manager_body.erb
index cc30f77..d739a79 100644
--- a/lib/rack/tracker/google_tag_manager/template/google_tag_manager_body.erb
+++ b/lib/rack/tracker/google_tag_manager/template/google_tag_manager_body.erb
@@ -1,4 +1,4 @@
 <% if container %>
-<noscript><iframe src="https://www.googletagmanager.com/ns.html?id=<%= container %>"
+<noscript><iframe src="https://<%= options[:host].presence || 'www.googletagmanager.com' %>/ns.html?id=<%= container %>"
 height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
 <% end %>
diff --git a/lib/rack/tracker/google_tag_manager/template/google_tag_manager_head.erb b/lib/rack/tracker/google_tag_manager/template/google_tag_manager_head.erb
index 3b059c0..06f1d9d 100644
--- a/lib/rack/tracker/google_tag_manager/template/google_tag_manager_head.erb
+++ b/lib/rack/tracker/google_tag_manager/template/google_tag_manager_head.erb
@@ -21,8 +21,6 @@
   (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
   new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
   j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
-  'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
+  "https://<%= options[:host].presence || 'www.googletagmanager.com' %>/gtm.js?id="+i+dl;f.parentNode.insertBefore(j,f);
   })(window,document,'script','dataLayer','<%= container %>');</script>
 <% end %>
-
-
diff --git a/lib/rack/tracker/version.rb b/lib/rack/tracker/version.rb
index 7d12101..51122c1 100644
--- a/lib/rack/tracker/version.rb
+++ b/lib/rack/tracker/version.rb
@@ -1,5 +1,5 @@
 module Rack
   class Tracker
-    VERSION = '1.12.1'
+    VERSION = '1.12.2'
   end
 end
diff --git a/spec/handler/facebook_pixel_spec.rb b/spec/handler/facebook_pixel_spec.rb
index 9716529..2be26e9 100644
--- a/spec/handler/facebook_pixel_spec.rb
+++ b/spec/handler/facebook_pixel_spec.rb
@@ -70,4 +70,31 @@ def env
       expect(subject).to match(%r{https://www.facebook.com/tr\?id=&ev=PageView&noscript=1})
     end
   end
+
+  describe 'with event_id' do
+    def env
+      {
+        'tracker' => {
+        'facebook_pixel' =>
+          [
+            {
+              'type' => 'Purchase',
+              'class_name' => 'Track',
+              'options' =>
+                {
+                  'value' => '23',
+                  'currency' => 'EUR'
+                },
+              'event_id' => '42'
+            }
+          ]
+        }
+      }
+    end
+    subject { described_class.new(env).render }
+
+    it 'will push the tracking event with the eventID param' do
+      expect(subject).to match(%r{"track", "Purchase", \{"value":"23","currency":"EUR"\}, \{"eventID":"42"\}})
+    end
+  end
 end