diff --git a/source/typed-array.d.ts b/source/typed-array.d.ts
index 15e22a3e..d4855ae4 100644
--- a/source/typed-array.d.ts
+++ b/source/typed-array.d.ts
@@ -1,3 +1,5 @@
+/// <reference lib="es2020.bigint"/>
+
 /**
 Matches any [typed array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray), like `Uint8Array` or `Float64Array`.
 */