diff --git a/src/index.ts b/src/index.ts
index e6e1de9..2544573 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -96,7 +96,7 @@ class Surah {
 
   get ayat(): Ayah[] {
     const ayat = require(`@json/${this.locale}/${this.id}.json`);
-    return ayat.map(([id, body]) => {
+    return ayat.map(([id, body]: [number, string]) => {
       const ms = Quran.durations[this.id - 1][id - 1] * 1000;
       return new Ayah({ id, body, ms });
     });