diff --git a/beacon_node/beacon_chain/src/execution_payload.rs b/beacon_node/beacon_chain/src/execution_payload.rs
index 5dc53dbcf2..5dae3ebfae 100644
--- a/beacon_node/beacon_chain/src/execution_payload.rs
+++ b/beacon_node/beacon_chain/src/execution_payload.rs
@@ -144,7 +144,7 @@ pub fn validate_merge_block<T: BeaconChainTypes>(
             // Check the optimistic sync conditions. Note that because this is the merge block,
             // the justified checkpoint can't have execution enabled so we only need to check the
             // current slot is at least SAFE_SLOTS_TO_IMPORT_OPTIMISTICALLY ahead of the block
-            // https://github.com/sigp/consensus-specs/blob/opt-sync-2/sync/optimistic.md#when-to-optimistically-import-blocks
+            // https://github.com/ethereum/consensus-specs/blob/v1.1.9/sync/optimistic.md#when-to-optimistically-import-blocks
             if current_slot - block.slot() >= chain.spec.safe_slots_to_import_optimistically {
                 debug!(
                     chain.log,