diff --git a/src/search.ts b/src/search.ts
index 461b6ac..a85403d 100644
--- a/src/search.ts
+++ b/src/search.ts
@@ -54,7 +54,7 @@ export async function initGlobalSearchIndex(): Promise<void> {
   const options = {
     tokenize,
     processTerm: (term: string) =>
-      settings.ignoreDiacritics ? removeDiacritics(term) : term,
+      (settings.ignoreDiacritics ? removeDiacritics(term) : term).toLowerCase(),
     idField: 'path',
     fields: [
       'basename',