diff --git a/kits/javascript/shims/index.js b/kits/javascript/shims/index.js
index 20bb9cc..6885baa 100644
--- a/kits/javascript/shims/index.js
+++ b/kits/javascript/shims/index.js
@@ -55,7 +55,7 @@ const requestToHandler = input => {
         error = `Couldn't process the response from the handler:\n${err}`;
       });
   } catch (err) {
-    error = `There was an error running the handler:\n${err}`;
+    error = `There was an error running the handler:\n${err}\n${err.stack}`;
   }
 };
 
diff --git a/kits/javascript/wasm-workers-quick-js-engine.wasm b/kits/javascript/wasm-workers-quick-js-engine.wasm
index 1bf0388..0a6c0be 100755
Binary files a/kits/javascript/wasm-workers-quick-js-engine.wasm and b/kits/javascript/wasm-workers-quick-js-engine.wasm differ