diff --git a/exampleSite/config.yaml b/exampleSite/config.yaml
index fb89f51..438984a 100644
--- a/exampleSite/config.yaml
+++ b/exampleSite/config.yaml
@@ -7,6 +7,9 @@ title: Example Site
 # Change it to your Disqus shortname before using
 disqusShortname: hugo-theme-stack
 
+# GA Tracking ID
+googleAnalytics:
+
 # Theme i18n support
 # Available values: en, fr, id, ja, ko, pt-br, zh-cn
 DefaultContentLanguage: en
@@ -50,7 +53,6 @@ params:
             repo:
             issueTerm: pathname
             label:
-            theme: preferred-color-scheme
 
     widgets:
         enabled:
diff --git a/layouts/partials/comments/provider/utterances.html b/layouts/partials/comments/provider/utterances.html
index e2ecf6d..a0c07a6 100644
--- a/layouts/partials/comments/provider/utterances.html
+++ b/layouts/partials/comments/provider/utterances.html
@@ -1,12 +1,12 @@
 <script src="https://utteranc.es/client.js" 
         repo="{{ .Site.Params.comments.utterances.repo }}"
         issue-term="{{ .Site.Params.comments.utterances.issueTerm }}"
-        theme="{{ .Site.Params.comments.utterances.theme }}" 
         {{ with .Site.Params.comments.utterances.label }}
         label="{{ . }}"
         {{ end }}
-        crossorigin="anonymous" 
-        async>
+        crossorigin="anonymous"
+        async
+        >
 </script>
 
 <style>
@@ -16,16 +16,25 @@
 </style>
 
 <script>
-    window.addEventListener('onColorSchemeChange', (e) => {
+    function setUtterancesTheme(theme) {
         let utterances = document.querySelector('.utterances iframe');
         if (utterances) {
             utterances.contentWindow.postMessage(
                 {
                     type: 'set-theme',
-                    theme: `github-${e.detail}`
+                    theme: `github-${theme}`
                 },
                 'https://utteranc.es'
             );
         }
+    }
+
+    addEventListener('message', event => {
+        if (event.origin !== 'https://utteranc.es') return;
+        setUtterancesTheme(document.body.dataset.scheme)
+    });
+
+    window.addEventListener('onColorSchemeChange', (e) => {
+        setUtterancesTheme(e.detail)
     })
 </script>
\ No newline at end of file
diff --git a/layouts/partials/head/head.html b/layouts/partials/head/head.html
index de2982c..fd9ef73 100644
--- a/layouts/partials/head/head.html
+++ b/layouts/partials/head/head.html
@@ -21,4 +21,5 @@
     <link rel="shortcut icon" href="{{ . }}" />
 {{ end }}
 
-{{- partial "head/custom.html" . -}}
\ No newline at end of file
+{{- template "_internal/google_analytics_async.html" . -}}
+{{- partial "head/custom.html" . -}}