diff --git a/arena/Heisenberg.json b/arena/Heisenberg.json
index 709229bff6b3..a77ce87d775c 100644
--- a/arena/Heisenberg.json
+++ b/arena/Heisenberg.json
@@ -1,4 +1,6 @@
-"github_repo_url": "https://github.com/georgehaws/Heisenberg",
+{
+ "github_repo_url": "https://github.com/georgehaws/Heisenberg",
  "timestamp": "2023-10-02T16:07:18-07:00",
  "commit_hash_to_benchmark": "949ab477a87cfb7a3668d7961e9443922081e098",
  "branch_to_benchmark": "master"
+}