diff --git a/crates/backend/src/typegen.rs b/crates/backend/src/typegen.rs
index b17907a6..123f6dc9 100644
--- a/crates/backend/src/typegen.rs
+++ b/crates/backend/src/typegen.rs
@@ -115,14 +115,14 @@ static KNOWN_TYPES: Lazy<HashMap<&'static str, &'static str>> = Lazy::new(|| {
     ("u8", "number"),
     ("u16", "number"),
     ("u32", "number"),
-    ("u64", "BigInt"),
-    ("i64n", "BigInt"),
-    ("u128", "BigInt"),
-    ("i128", "BigInt"),
-    ("usize", "BigInt"),
-    ("isize", "BigInt"),
-    ("JsBigInt", "BigInt"),
-    ("BigInt", "BigInt"),
+    ("u64", "bigint"),
+    ("i64n", "bigint"),
+    ("u128", "bigint"),
+    ("i128", "bigint"),
+    ("usize", "bigint"),
+    ("isize", "bigint"),
+    ("JsBigInt", "bigint"),
+    ("BigInt", "bigint"),
     ("JsBoolean", "boolean"),
     ("bool", "boolean"),
     ("JsString", "string"),
diff --git a/examples/napi-compat-mode/__test__/get-napi-version.spec.ts b/examples/napi-compat-mode/__test__/get-napi-version.spec.ts
index 62fa68b8..c623c437 100644
--- a/examples/napi-compat-mode/__test__/get-napi-version.spec.ts
+++ b/examples/napi-compat-mode/__test__/get-napi-version.spec.ts
@@ -5,5 +5,5 @@ const bindings = require('../index.node')
 test('should get napi version', (t) => {
   const napiVersion = bindings.getNapiVersion()
   t.true(typeof napiVersion === 'number')
-  t.is(`${napiVersion}`, process.versions.napi)
+  t.is(`${napiVersion}`, process.versions.napi!)
 })
diff --git a/examples/napi/__test__/typegen.spec.ts.md b/examples/napi/__test__/typegen.spec.ts.md
index 25d3615b..ec3e0649 100644
--- a/examples/napi/__test__/typegen.spec.ts.md
+++ b/examples/napi/__test__/typegen.spec.ts.md
@@ -27,9 +27,9 @@ Generated by [AVA](https://avajs.dev).
     export function sumNums(nums: Array<number>): number␊
     export function readFileAsync(path: string): Promise<Buffer>␊
     export function asyncMultiTwo(arg: number): Promise<number>␊
-    export function bigintAdd(a: BigInt, b: BigInt): BigInt␊
-    export function createBigInt(): BigInt␊
-    export function createBigIntI64(): BigInt␊
+    export function bigintAdd(a: bigint, b: bigint): bigint␊
+    export function createBigInt(): bigint␊
+    export function createBigIntI64(): bigint␊
     export function getCwd(callback: (arg0: string) => void): void␊
     /** napi = { version = 2, features = ["serde-json"] } */␊
     export function readFile(callback: (arg0: Error | undefined, arg1?: string | undefined | null) => void): void␊
@@ -69,7 +69,7 @@ Generated by [AVA](https://avajs.dev).
     export function getExternal(external: ExternalObject<number>): number␊
     export function mutateExternal(external: ExternalObject<number>, newVal: number): void␊
     export function tsRename(a: { foo: number }): string[]␊
-    export function xxh64Alias(input: Buffer): BigInt␊
+    export function xxh64Alias(input: Buffer): bigint␊
     export function getMapping(): Record<string, number>␊
     export function sumMapping(nums: Record<string, number>): number␊
     export function mapOption(val?: number | undefined | null): number | undefined | null␊
@@ -207,19 +207,19 @@ Generated by [AVA](https://avajs.dev).
     }␊
     export namespace xxh3 {␊
       export const ALIGNMENT: number␊
-      export function xxh3_64(input: Buffer): BigInt␊
+      export function xxh3_64(input: Buffer): bigint␊
       /** xxh128 function */␊
-      export function xxh128(input: Buffer): BigInt␊
+      export function xxh128(input: Buffer): bigint␊
       /** Xxh3 class */␊
       export class Xxh3 {␊
         constructor()␊
         /** update */␊
         update(input: Buffer): void␊
-        digest(): BigInt␊
+        digest(): bigint␊
       }␊
     }␊
     export namespace xxh2 {␊
       export function xxh2Plus(a: number, b: number): number␊
-      export function xxh3Xxh64Alias(input: Buffer): BigInt␊
+      export function xxh3Xxh64Alias(input: Buffer): bigint␊
     }␊
     `
diff --git a/examples/napi/__test__/typegen.spec.ts.snap b/examples/napi/__test__/typegen.spec.ts.snap
index a929b2b0..a29f5f01 100644
Binary files a/examples/napi/__test__/typegen.spec.ts.snap and b/examples/napi/__test__/typegen.spec.ts.snap differ
diff --git a/examples/napi/index.d.ts b/examples/napi/index.d.ts
index 31d68233..d6e712b8 100644
--- a/examples/napi/index.d.ts
+++ b/examples/napi/index.d.ts
@@ -17,9 +17,9 @@ export function getNums(): Array<number>
 export function sumNums(nums: Array<number>): number
 export function readFileAsync(path: string): Promise<Buffer>
 export function asyncMultiTwo(arg: number): Promise<number>
-export function bigintAdd(a: BigInt, b: BigInt): BigInt
-export function createBigInt(): BigInt
-export function createBigIntI64(): BigInt
+export function bigintAdd(a: bigint, b: bigint): bigint
+export function createBigInt(): bigint
+export function createBigIntI64(): bigint
 export function getCwd(callback: (arg0: string) => void): void
 /** napi = { version = 2, features = ["serde-json"] } */
 export function readFile(callback: (arg0: Error | undefined, arg1?: string | undefined | null) => void): void
@@ -59,7 +59,7 @@ export function createExternalString(content: string): ExternalObject<string>
 export function getExternal(external: ExternalObject<number>): number
 export function mutateExternal(external: ExternalObject<number>, newVal: number): void
 export function tsRename(a: { foo: number }): string[]
-export function xxh64Alias(input: Buffer): BigInt
+export function xxh64Alias(input: Buffer): bigint
 export function getMapping(): Record<string, number>
 export function sumMapping(nums: Record<string, number>): number
 export function mapOption(val?: number | undefined | null): number | undefined | null
@@ -197,18 +197,18 @@ export class JsClassForEither {
 }
 export namespace xxh3 {
   export const ALIGNMENT: number
-  export function xxh3_64(input: Buffer): BigInt
+  export function xxh3_64(input: Buffer): bigint
   /** xxh128 function */
-  export function xxh128(input: Buffer): BigInt
+  export function xxh128(input: Buffer): bigint
   /** Xxh3 class */
   export class Xxh3 {
     constructor()
     /** update */
     update(input: Buffer): void
-    digest(): BigInt
+    digest(): bigint
   }
 }
 export namespace xxh2 {
   export function xxh2Plus(a: number, b: number): number
-  export function xxh3Xxh64Alias(input: Buffer): BigInt
+  export function xxh3Xxh64Alias(input: Buffer): bigint
 }
diff --git a/tsconfig.json b/tsconfig.json
index 5de32776..16988746 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -27,5 +27,5 @@
     "lib": ["dom", "DOM.Iterable", "ES2019", "ES2020", "esnext"]
   },
   "include": ["."],
-  "exclude": ["node_modules", "bench", "cli/scripts", "scripts", "examples"]
+  "exclude": ["node_modules", "bench", "cli/scripts", "scripts"]
 }