diff --git a/defaults/preferences/zotero.js b/defaults/preferences/zotero.js
index af82adf9e..357689639 100644
--- a/defaults/preferences/zotero.js
+++ b/defaults/preferences/zotero.js
@@ -138,8 +138,8 @@ pref("extensions.zotero.sync.storage.maxDownloads", 4);
 pref("extensions.zotero.sync.storage.maxUploads", 2);
 pref("extensions.zotero.sync.storage.deleteDelayDays", 30);
 pref("extensions.zotero.sync.storage.groups.enabled", true);
-pref("extensions.zotero.sync.storage.downloadMode.personal", "on-demand");
-pref("extensions.zotero.sync.storage.downloadMode.groups", "on-demand");
+pref("extensions.zotero.sync.storage.downloadMode.personal", "on-sync");
+pref("extensions.zotero.sync.storage.downloadMode.groups", "on-sync");
 
 // Proxy
 pref("extensions.zotero.proxies.autoRecognize", true);