diff --git a/chrome/content/zotero/xpcom/schema.js b/chrome/content/zotero/xpcom/schema.js
index ef0a7f62bc..4808b9d8a2 100644
--- a/chrome/content/zotero/xpcom/schema.js
+++ b/chrome/content/zotero/xpcom/schema.js
@@ -940,7 +940,8 @@ Zotero.Schema = new function () {
 		_localUpdateInProgress = true;
 		
 		try {
-			await Zotero.proxyAuthComplete.delay(1000);
+			await Zotero.proxyAuthComplete;
+			await Zotero.Promise.delay(1000);
 			
 			Zotero.debug("Updating bundled " + (mode || "files"));