diff --git a/6-data-storage/03-indexeddb/article.md b/6-data-storage/03-indexeddb/article.md
index 665664b4..19b5d7e9 100644
--- a/6-data-storage/03-indexeddb/article.md
+++ b/6-data-storage/03-indexeddb/article.md
@@ -5,7 +5,7 @@ libs:
 
 # IndexedDB
 
-IndexedDB is a database that is built into browser, much more powerful than `localStorage`.
+IndexedDB is a database that is built into a browser, much more powerful than `localStorage`.
 
 - Stores almost any kind of values by keys, multiple key types.
 - Supports transactions for reliability.