diff --git a/backend/windmill-worker/src/worker.rs b/backend/windmill-worker/src/worker.rs
index 1a3795632e..f0509ec1f3 100644
--- a/backend/windmill-worker/src/worker.rs
+++ b/backend/windmill-worker/src/worker.rs
@@ -1507,6 +1507,10 @@ const args = await Deno.readTextFile("args.json")
     .then(JSON.parse)
     .then(({{ {spread} }}) => [ {spread} ])
 
+BigInt.prototype.toJSON = function () {{
+    return this.toString();
+}};
+
 {dates}
 async function run() {{
     let res: any = await main(...args);