diff --git a/src/popup.js b/src/popup.js
index b6ecd38..ee2229e 100644
--- a/src/popup.js
+++ b/src/popup.js
@@ -12,7 +12,7 @@ const groupByDomain = (tabs) => {
 const render = async () => {
   const tabs = await chrome.tabs.query({ currentWindow: true });
   const groups = groupByDomain(tabs);
-  const sorted = Object.entries(groups).sort(([a], [b]) => a.localeCompare(b));
+  const sorted = Object.entries(groups).sort(([a], [b]) => a.localeCompare(b, undefined, { sensitivity: "base" }));
 
   const container = document.getElementById('groups');
   container.innerHTML = '';