diff --git a/public/_kleap/kleap-shim.js b/public/_kleap/kleap-shim.js
index 12c9fdd..9a5d823 100644
--- a/public/_kleap/kleap-shim.js
+++ b/public/_kleap/kleap-shim.js
@@ -123,8 +123,7 @@
       .then((stackFrames) => {
         const sourcemappedStack = stackFrames
           .map((sf) => sf.toString())
-          .join("
-");
+          .join("\n");
 
         const payload = {
           message: error?.message || String(error),
@@ -149,11 +148,8 @@
           message: error?.message || String(error),
           // Provide the raw stack or an indication of mapping failure
           stack: error?.stack
-            ? `Sourcemapping failed: ${mappingError.message}
---- Raw Stack ---
-${error.stack}`
-            : `Sourcemapping failed: ${mappingError.message}
-<no raw stack available>`,
+            ? `Sourcemapping failed: ${mappingError.message}\n--- Raw Stack ---\n${error.stack}`
+            : `Sourcemapping failed: ${mappingError.message}\n<no raw stack available>`,
         };
 
         window.parent.postMessage(