diff --git a/lib/index.d.ts b/lib/index.d.ts
index 6ac612de..bed089b8 100644
--- a/lib/index.d.ts
+++ b/lib/index.d.ts
@@ -78,6 +78,6 @@ export function hasNativeBigInt(): boolean;
 
 export function hasBigDecimal(): boolean;
 
-export function setBigInt(bigIntClass: Function | boolean): void;
+export function setBigInt(bigIntClass: any): void;
 
-export function setBigDecimal(bigDoubleClass: Function): void;
+export function setBigDecimal(bigDoubleClass: any): void;
diff --git a/package.json b/package.json
index d31f3bbe..87976b41 100644
--- a/package.json
+++ b/package.json
@@ -1,8 +1,9 @@
 {
   "name": "json-z",
-  "version": "3.0.3",
+  "version": "3.0.4",
   "description": "JSON for everyone.",
   "main": "lib/index.js",
+  "types": "lib/index.d.ts",
   "bin": "lib/cli.js",
   "browser": "dist/index.js",
   "files": [