diff --git a/layouts/partials/comments/utterances.html b/layouts/partials/comments/utterances.html
index ff3592b5..f613495e 100644
--- a/layouts/partials/comments/utterances.html
+++ b/layouts/partials/comments/utterances.html
@@ -10,7 +10,7 @@
     var getTheme = window.localStorage && window.localStorage.getItem("theme");
     getTheme = getTheme == null ? 'dark' : getTheme;
 
-    let theme = getTheme === 'dark' ? 'github-dark' : 'github-light';
+    let theme = getTheme === 'dark' ? 'gruvbox-dark' : 'github-light';
     let s = document.createElement('script');
     s.src = 'https://utteranc.es/client.js';
     s.setAttribute('repo', '{{ print $username "/" $repository }}');