diff --git a/.github/workflows/npm-publish.yml b/.github/workflows/npm-publish.yml
index 2ff6c7e18..8cbb5b6be 100644
--- a/.github/workflows/npm-publish.yml
+++ b/.github/workflows/npm-publish.yml
@@ -9,6 +9,7 @@ on:
       - closed
     branches:
       - main
+      - fix/bigint-data
 
 jobs:
   build:
diff --git a/packages/module/package.json b/packages/module/package.json
index 44ca17f5a..ab11cd22c 100644
--- a/packages/module/package.json
+++ b/packages/module/package.json
@@ -3,7 +3,7 @@
   "description": "Rapidly build Web3 apps on the Cardano Blockchain.",
   "homepage": "https://meshjs.dev",
   "author": "MeshJS",
-  "version": "1.5.14",
+  "version": "1.5.15-beta",
   "license": "Apache-2.0",
   "type": "module",
   "repository": {
@@ -75,6 +75,7 @@
     "@emurgo/cip14-js": "3.0.1",
     "axios": "1.6.3",
     "bip39": "3.0.4",
+    "json-bigint": "^1.0.0",
     "nanoid": "3.3.4",
     "zod": "3.22.4"
   }
diff --git a/packages/module/src/transaction/meshTxBuilder/meshTxBuilderCore.ts b/packages/module/src/transaction/meshTxBuilder/meshTxBuilderCore.ts
index 1a3b8251a..e84b198da 100644
--- a/packages/module/src/transaction/meshTxBuilder/meshTxBuilderCore.ts
+++ b/packages/module/src/transaction/meshTxBuilder/meshTxBuilderCore.ts
@@ -40,6 +40,7 @@ import {
   TxInParameter,
 } from './type';
 import { selectUtxos } from '@mesh/core/CPS-009';
+import JSONbig from 'json-bigint';
 
 export class MeshTxBuilderCore {
   txHex = '';
@@ -1390,7 +1391,7 @@ export class MeshTxBuilderCore {
       poolOwners,
       relays,
       poolParams.metadata
-        ? csl.PoolMetadata.from_json(JSON.stringify(poolParams.metadata))
+        ? csl.PoolMetadata.from_json(JSONbig.stringify(poolParams.metadata))
         : undefined
     );
   };
@@ -1520,7 +1521,7 @@ export class MeshTxBuilderCore {
     allMetadata.forEach(({ tag, metadata }) => {
       this.txBuilder.add_json_metadatum(
         csl.BigNum.from_str(tag),
-        JSON.stringify(metadata)
+        JSONbig.stringify(metadata)
       );
     });
   };
@@ -1567,7 +1568,7 @@ export class MeshTxBuilderCore {
 
   protected castRawDataToJsonString = (rawData: object | string) => {
     if (typeof rawData === 'object') {
-      return JSON.stringify(rawData);
+      return JSONbig.stringify(rawData);
     } else {
       return rawData as string;
     }
diff --git a/packages/react/package.json b/packages/react/package.json
index 447db1793..b37fd771c 100644
--- a/packages/react/package.json
+++ b/packages/react/package.json
@@ -62,7 +62,7 @@
     "vite": "3.1.4"
   },
   "peerDependencies": {
-    "@meshsdk/core": "1.5.14",
+    "@meshsdk/core": "1.5.15-beta",
     "react-dom": "17.x || 18.x",
     "react": "17.x || 18.x"
   },
diff --git a/yarn.lock b/yarn.lock
index 3ce54597d..9a66485e6 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -6359,6 +6359,11 @@ big.js@^5.2.2:
   resolved "https://registry.yarnpkg.com/big.js/-/big.js-5.2.2.tgz#65f0af382f578bcdc742bd9c281e9cb2d7768328"
   integrity sha512-vyL2OymJxmarO8gxMr0mhChsO9QGwhynfuu4+MHTAW6czfq9humCB7rKpUjDd9YUiDPU4mzpyupFSvOClAwbmQ==
 
+bignumber.js@^9.0.0:
+  version "9.1.2"
+  resolved "https://registry.yarnpkg.com/bignumber.js/-/bignumber.js-9.1.2.tgz#b7c4242259c008903b13707983b5f4bbd31eda0c"
+  integrity sha512-2/mKyZH9K85bzOEfhXDBFZTGd1CTs+5IHpeFQo9luiBG7hghdC851Pj2WAhb6E3R6b9tZj/XKhbg4fum+Kepug==
+
 binary-extensions@^1.0.0:
   version "1.13.1"
   resolved "https://registry.yarnpkg.com/binary-extensions/-/binary-extensions-1.13.1.tgz#598afe54755b2868a5330d2aff9d4ebb53209b65"
@@ -11968,6 +11973,13 @@ jsesc@~0.5.0:
   resolved "https://registry.yarnpkg.com/jsesc/-/jsesc-0.5.0.tgz#e7dee66e35d6fc16f710fe91d5cf69f70f08911d"
   integrity sha512-uZz5UnB7u4T9LvwmFqXii7pZSouaRPorGs5who1Ip7VO0wxanFvBL7GkM6dTHlgX+jhBApRetaWpnDabOeTcnA==
 
+json-bigint@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/json-bigint/-/json-bigint-1.0.0.tgz#ae547823ac0cad8398667f8cd9ef4730f5b01ff1"
+  integrity sha512-SiPv/8VpZuWbvLSMtTDU8hEfrZWg/mH/nV/b4o0CYbSxu1UIQPLdwKOCIyLQX+VIPO5vrLX3i8qtqFyhdPSUSQ==
+  dependencies:
+    bignumber.js "^9.0.0"
+
 json-buffer@3.0.1:
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/json-buffer/-/json-buffer-3.0.1.tgz#9338802a30d3b6605fbe0613e094008ca8c05a13"