diff --git a/website/static/worker.js b/website/static/worker.js
index 5af519105..18e423b56 100644
--- a/website/static/worker.js
+++ b/website/static/worker.js
@@ -41,7 +41,11 @@ function serializeAst(ast) {
   return JSON.stringify(
     ast,
     (_, value) =>
-      typeof value === "bigint" ? `BigInt('${String(value)}')` : value,
+      value instanceof Error
+        ? { name: value.name, message: value.message, ...value }
+        : typeof value === "bigint"
+        ? `BigInt('${String(value)}')`
+        : value,
     2
   );
 }