diff --git a/package.json b/package.json
index d99b862..5639361 100644
--- a/package.json
+++ b/package.json
@@ -58,7 +58,7 @@
     "unist-util-visit": "^5.0.0",
     "unist-util-visit-parents": "^6.0.1",
     "yamljs": "^0.3.0",
-    "zotero-plugin-toolkit": "^2.3.26"
+    "zotero-plugin-toolkit": "^2.3.28"
   },
   "devDependencies": {
     "@esbuild-plugins/node-globals-polyfill": "^0.2.3",
diff --git a/src/modules/sync/managerWindow.ts b/src/modules/sync/managerWindow.ts
index ee17f5f..493b783 100644
--- a/src/modules/sync/managerWindow.ts
+++ b/src/modules/sync/managerWindow.ts
@@ -102,7 +102,7 @@ export async function showSyncManager() {
       // @ts-ignore TODO: Fix type in zotero-plugin-toolkit
       .setProp("onColumnSort", (columnIndex, ascending) => {
         addon.data.sync.manager.columnIndex = columnIndex;
-        addon.data.sync.manager.columnAscending = ascending;
+        addon.data.sync.manager.columnAscending = ascending > 0;
         refresh();
       })
       .render();