diff --git a/src/background.js b/src/background.js
index f7868a9..f2a89d6 100644
--- a/src/background.js
+++ b/src/background.js
@@ -94,13 +94,13 @@ function startFetching() {
 	});
 }
 
-window.addEventListener('offline', async () => {
+globalThis.addEventListener('offline', async () => {
 	browser.alarms.onAlarm.removeListener(handleAlarm);
 	await browser.alarms.clear('fetchData');
 });
-window.addEventListener('online', () => {
+globalThis.addEventListener('online', () => {
 	startFetching();
 });
-if (window.navigator.onLine) {
+if (globalThis.navigator.onLine) {
 	startFetching();
 }