diff --git a/dns_compare.py b/dns_compare.py
index 84d3ed3..e882964 100755
--- a/dns_compare.py
+++ b/dns_compare.py
@@ -341,8 +341,10 @@ end_time = time.time()
 end_time_iso = datetime.fromtimestamp(end_time).isoformat()
 elapsed_time = end_time - start_time
 
-output["start_time"] = start_time_iso
-output["end_time"] = end_time_iso
-output["runtime"] = f"{elapsed_time:.2f}s"
+output["metadata"] = {
+    "start_time": start_time_iso,
+    "end_time": end_time_iso,
+    "runtime": f"{elapsed_time:.2f}s"
+}
 
 print(json.dumps(output, indent=4))