diff --git a/package.json b/package.json
index 57a1f5b..d3ba86d 100644
--- a/package.json
+++ b/package.json
@@ -43,12 +43,11 @@
   "homepage": "https://github.com/yumi-team/meta-messenger.js",
   "license": "AGPL-3.0-or-later",
   "dependencies": {
-    "json-bigint": "^1.0.0",
+    "yumi-json-bigint": "^1.0.0",
     "koffi": "^2.15.1",
     "undici": "^7.20.0"
   },
   "devDependencies": {
-    "@types/json-bigint": "^1.0.4",
     "@types/node": "^25.1.0",
     "@typescript-eslint/eslint-plugin": "^7.15.0",
     "@typescript-eslint/parser": "^7.15.0",
diff --git a/src/json-bigint.d.ts b/src/json-bigint.d.ts
new file mode 100644
index 0000000..f67f93f
--- /dev/null
+++ b/src/json-bigint.d.ts
@@ -0,0 +1,55 @@
+/*
+ * meta-messenger.js
+ * Unofficial Meta Messenger Chat API for Node.js
+ *
+ * Copyright (c) 2026 Yumi Team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare module "yumi-json-bigint" {
+    export type JSONBigIntAction = "error" | "ignore" | "preserve";
+
+    export interface JSONBigIntOptions {
+        strict?: boolean;
+        storeAsString?: boolean;
+        alwaysParseAsBig?: boolean;
+        parseAsBigInt32?: boolean;
+        useNativeBigInt?: boolean;
+        protoAction?: JSONBigIntAction;
+        constructorAction?: JSONBigIntAction;
+    }
+
+    export interface JSONBigInt {
+        parse(text: string, reviver?: (key: string, value: unknown) => unknown): unknown;
+        stringify(
+            value: unknown,
+            replacer?: ((key: string, value: unknown) => unknown) | Array<string | number>,
+            space?: string | number,
+        ): string;
+    }
+
+    export interface JSONBigIntStatic {
+        (options?: JSONBigIntOptions): JSONBigInt;
+        parse(text: string, reviver?: (key: string, value: unknown) => unknown): unknown;
+        stringify(
+            value: unknown,
+            replacer?: ((key: string, value: unknown) => unknown) | Array<string | number>,
+            space?: string | number,
+        ): string;
+    }
+
+    const JSONBigInt: JSONBigIntStatic;
+    export default JSONBigInt;
+}
diff --git a/src/native.ts b/src/native.ts
index 2775590..c0c847d 100644
--- a/src/native.ts
+++ b/src/native.ts
@@ -22,8 +22,8 @@ import fs from "node:fs";
 import path from "node:path";
 import { fileURLToPath } from "node:url";
 
-import JSONBig from "json-bigint";
 import koffi from "koffi";
+import JSONBig from "yumi-json-bigint";
 
 // Configure json-bigint to use native BigInt
 const JSONBigNative = JSONBig({ useNativeBigInt: true });