diff --git a/apis/eventstream/index.yaml b/apis/eventstream/index.yaml
index 419de663..ee17e3b5 100644
--- a/apis/eventstream/index.yaml
+++ b/apis/eventstream/index.yaml
@@ -107,7 +107,7 @@ get:
               description: The node has reorganized its chain
               value: |
                 event: chain_reorg
-                data: {"slot":"200", "depth":"50", "old_head_block":"0x9a2fefd2fdb57f74993c7780ea5b9030d2897b615b89f808011ca5aebed54eaf", "new_head_block":"0x76262e91970d375a19bfe8a867288d7b9cde43c8635f598d93d39d041706fc76", "old_head_state":"0x9a2fefd2fdb57f74993c7780ea5b9030d2897b615b89f808011ca5aebed54eaf", "new_head_state":"0x600e852a08c1200654ddf11025f1ceacb3c2e74bdd5c630cde0838b2591b69f9", "epoch":"2", "execution_optimistic": false}
+                data: {"slot":"200", "depth":"50", "old_head_hash": "0x3b2a1c9d8e7f6054a3b2c1d0e9f8a7b6c5d4e3f2a1b0c9d8e7f60543b2a1c9d", "old_head_block":"0x9a2fefd2fdb57f74993c7780ea5b9030d2897b615b89f808011ca5aebed54eaf", "new_head_hash": "0xe4d3c2b1a0f9e8d7c6b5a49382716054f3e2d1c0b9a8f7e6d5c4b3a291807162", "new_head_block":"0x76262e91970d375a19bfe8a867288d7b9cde43c8635f598d93d39d041706fc76", "old_head_state":"0x9a2fefd2fdb57f74993c7780ea5b9030d2897b615b89f808011ca5aebed54eaf", "new_head_state":"0x600e852a08c1200654ddf11025f1ceacb3c2e74bdd5c630cde0838b2591b69f9", "epoch":"2", "execution_optimistic": false}
             contribution_and_proof:
               description: The node has received a SignedContributionAndProof (from P2P or API) that passes validation rules of the `sync_committee_contribution_and_proof` topic
               value: |