diff --git a/v4-client-js/__native__/__ios__/v4-native-client.js b/v4-client-js/__native__/__ios__/v4-native-client.js
index b7d36c80..82eb65b1 100644
--- a/v4-client-js/__native__/__ios__/v4-native-client.js
+++ b/v4-client-js/__native__/__ios__/v4-native-client.js
@@ -202360,7 +202360,7 @@ function encodeJson(object, byteArrayEncoding = ByteArrayEncoding.HEX) {
         if (value instanceof bignumber_js_1.default) {
             return value.toString();
         }
-        if (value instanceof BigInt) {
+        if (typeof value === 'bigint') {
             return value.toString();
         }
         if (value instanceof long_1.default) {
@@ -202386,7 +202386,7 @@ function encodeJson(object, byteArrayEncoding = ByteArrayEncoding.HEX) {
     });
 }
 exports.encodeJson = encodeJson;
-//# sourceMappingURL=data:application/json;base64,eyJ2ZXJzaW9uIjozLCJmaWxlIjoiaGVscGVycy5qcyIsInNvdXJjZVJvb3QiOiIiLCJzb3VyY2VzIjpbIi4uLy4uLy4uL3NyYy9saWIvaGVscGVycy50cyJdLCJuYW1lcyI6W10sIm1hcHBpbmdzIjoiOzs7Ozs7QUFBQSwrQ0FBeUM7QUFDekMsZ0VBQXFDO0FBQ3JDLGdEQUF3QjtBQUd4QiwyQ0FBK0M7QUFFL0M7Ozs7O0dBS0c7QUFDSCxTQUFnQixzQ0FBc0MsQ0FDcEQseUJBQXFEO0lBRXJELElBQUkseUJBQXlCLEtBQUssU0FBUyxFQUFFO1FBQzNDLE9BQU8sU0FBUyxDQUFDO0tBQ2xCO0lBRUQsT0FBTztRQUNMLFFBQVEsRUFBRSw0QkFBZ0I7UUFDMUIsR0FBRyx5QkFBeUI7S0FDN0IsQ0FBQztBQUNKLENBQUM7QUFYRCx3RkFXQztBQUVEOzs7OztHQUtHO0FBQ0gsU0FBZ0IsY0FBYyxDQUFDLEtBQWE7SUFDMUMsSUFBSSxLQUFLLENBQUMsT0FBTyxDQUFDLElBQUksQ0FBQyxLQUFLLENBQUMsRUFBRTtRQUM3QixPQUFPLEtBQUssQ0FBQyxLQUFLLENBQUMsQ0FBQyxDQUFDLENBQUM7S0FDdkI7SUFFRCxPQUFPLEtBQUssQ0FBQztBQUNmLENBQUM7QUFORCx3Q0FNQztBQUVELFNBQVMsUUFBUSxDQUFDLENBQWE7SUFDN0IsSUFBSSxDQUFDLENBQUMsTUFBTSxJQUFJLENBQUMsRUFBRTtRQUNqQixPQUFPLE1BQU0sQ0FBQyxDQUFDLENBQUMsQ0FBQztLQUNsQjtJQUNELHNDQUFzQztJQUN0QyxNQUFNLE9BQU8sR0FBWSxDQUFDLENBQUMsQ0FBQyxDQUFDLENBQUMsR0FBRyxDQUFDLENBQUMsS0FBSyxDQUFDLENBQUM7SUFDMUMsTUFBTSxHQUFHLEdBQVcsTUFBTSxDQUFDLElBQUksQ0FBQyxDQUFDLENBQUMsS0FBSyxDQUFDLENBQUMsQ0FBQyxDQUFDLENBQUMsUUFBUSxDQUFDLEtBQUssQ0FBQyxDQUFDO0lBQzVELE1BQU0sR0FBRyxHQUFXLE1BQU0sQ0FBQyxLQUFLLEdBQUcsRUFBRSxDQUFDLENBQUM7SUFDdkMsT0FBTyxPQUFPLENBQUMsQ0FBQyxDQUFDLENBQUMsR0FBRyxDQUFDLENBQUMsQ0FBQyxHQUFHLENBQUM7QUFDOUIsQ0FBQztBQUVELElBQVksaUJBR1g7QUFIRCxXQUFZLGlCQUFpQjtJQUMzQixnQ0FBVyxDQUFBO0lBQ1gsc0NBQWlCLENBQUE7QUFDbkIsQ0FBQyxFQUhXLGlCQUFpQixHQUFqQix5QkFBaUIsS0FBakIseUJBQWlCLFFBRzVCO0FBRUQsU0FBZ0IsVUFBVSxDQUN4QixNQUFlLEVBQ2Ysb0JBQXVDLGlCQUFpQixDQUFDLEdBQUc7SUFFNUQsaURBQWlEO0lBQ2pELE9BQU8sSUFBSSxDQUFDLFNBQVMsQ0FBQyxNQUFNLEVBQUUsU0FBUyxRQUFRLENBQUMsSUFBSSxFQUFFLEtBQUs7UUFDekQscURBQXFEO1FBQ3JELHdFQUF3RTtRQUN4RSxJQUFJLEtBQUssWUFBWSxzQkFBUyxFQUFFO1lBQzlCLE9BQU8sS0FBSyxDQUFDLFFBQVEsRUFBRSxDQUFDO1NBQ3pCO1FBQ0QsSUFBSSxLQUFLLFlBQVksTUFBTSxFQUFFO1lBQzNCLE9BQU8sS0FBSyxDQUFDLFFBQVEsRUFBRSxDQUFDO1NBQ3pCO1FBQ0QsSUFBSSxLQUFLLFlBQVksY0FBSSxFQUFFO1lBQ3pCLE9BQU8sS0FBSyxDQUFDLFFBQVEsRUFBRSxDQUFDO1NBQ3pCO1FBQ0QsSUFBSSxDQUFBLEtBQUssYUFBTCxLQUFLLHVCQUFMLEtBQUssQ0FBRSxNQUFNLGFBQVksVUFBVSxFQUFFO1lBQ3ZDLElBQUksaUJBQWlCLEtBQUssaUJBQWlCLENBQUMsR0FBRyxFQUFFO2dCQUMvQyxPQUFPLElBQUEsZ0JBQUssRUFBQyxLQUFLLENBQUMsTUFBTSxDQUFDLENBQUM7YUFDNUI7aUJBQU07Z0JBQ0wsT0FBTyxRQUFRLENBQUMsS0FBSyxDQUFDLE1BQU0sQ0FBQyxDQUFDLFFBQVEsRUFBRSxDQUFDO2FBQzFDO1NBQ0Y7YUFBTSxJQUFJLEtBQUssWUFBWSxVQUFVLEVBQUU7WUFDdEMsSUFBSSxpQkFBaUIsS0FBSyxpQkFBaUIsQ0FBQyxHQUFHLEVBQUU7Z0JBQy9DLE9BQU8sSUFBQSxnQkFBSyxFQUFDLEtBQUssQ0FBQyxDQUFDO2FBQ3JCO2lCQUFNO2dCQUNMLE9BQU8sUUFBUSxDQUFDLEtBQUssQ0FBQyxDQUFDLFFBQVEsRUFBRSxDQUFDO2FBQ25DO1NBQ0Y7UUFDRCxPQUFPLEtBQUssQ0FBQztJQUNmLENBQUMsQ0FBQyxDQUFDO0FBQ0wsQ0FBQztBQWhDRCxnQ0FnQ0MifQ==
+//# sourceMappingURL=data:application/json;base64,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
 
 /***/ }),
 
diff --git a/v4-client-js/package-lock.json b/v4-client-js/package-lock.json
index aec7c397..3352e963 100644
--- a/v4-client-js/package-lock.json
+++ b/v4-client-js/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@dydxprotocol/v4-client-js",
-  "version": "1.0.14",
+  "version": "1.0.15",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "@dydxprotocol/v4-client-js",
-      "version": "1.0.14",
+      "version": "1.0.15",
       "license": "AGPL-3.0",
       "dependencies": {
         "@cosmjs/amino": "^0.32.1",
diff --git a/v4-client-js/package.json b/v4-client-js/package.json
index a1dbb6fc..2678c380 100644
--- a/v4-client-js/package.json
+++ b/v4-client-js/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@dydxprotocol/v4-client-js",
-  "version": "1.0.14",
+  "version": "1.0.15",
   "description": "General client library for the new dYdX system (v4 decentralized)",
   "main": "build/src/index.js",
   "scripts": {
diff --git a/v4-client-js/src/clients/native.ts b/v4-client-js/src/clients/native.ts
index a5721755..0f2ba014 100644
--- a/v4-client-js/src/clients/native.ts
+++ b/v4-client-js/src/clients/native.ts
@@ -1112,7 +1112,7 @@ export async function withdrawToNobleIBC(payload: string): Promise<String> {
         ...parsedIbcPayload.msg,
         // Squid returns timeoutTimestamp as Long, but the signer expects BigInt
         timeoutTimestamp: parsedIbcPayload.msg.timeoutTimestamp
-          ? BigInt(Long.fromValue(json.msg.timeoutTimestamp).toString())
+          ? BigInt(Long.fromValue(parsedIbcPayload.msg.timeoutTimestamp).toString())
           : undefined,
       },
     };
diff --git a/v4-client-js/src/lib/helpers.ts b/v4-client-js/src/lib/helpers.ts
index 942616da..fd7ea0b6 100644
--- a/v4-client-js/src/lib/helpers.ts
+++ b/v4-client-js/src/lib/helpers.ts
@@ -65,7 +65,7 @@ export function encodeJson(
     if (value instanceof BigNumber) {
       return value.toString();
     }
-    if (value instanceof BigInt) {
+    if (typeof value === 'bigint') {
       return value.toString();
     }
     if (value instanceof Long) {