diff --git a/node_modules/scrypt-ts/dist/client/apis/contract/sync-hashed-props.js b/node_modules/scrypt-ts/dist/client/apis/contract/sync-hashed-props.js
index 38da3ed..58c0259 100644
--- a/node_modules/scrypt-ts/dist/client/apis/contract/sync-hashed-props.js
+++ b/node_modules/scrypt-ts/dist/client/apis/contract/sync-hashed-props.js
@@ -6,7 +6,8 @@ const hashed_map_1 = require("../../../smart-contract/builtins/hashed-map");
 const types_1 = require("../../../smart-contract/builtins/types");
 ;
 // monkey patch BigInt.toJSON as recommended by https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/BigInt#use_within_json
-BigInt.prototype.toJSON = function () { return this.toString(); };
+// remove this monkey patch because it is not compatible with SES
+// BigInt.prototype.toJSON = function () { return this.toString(); };
 class SyncHashedPropsAction {
     constructor() {
         this.method = 'POST';