diff --git a/specs/phase1/validator.md b/specs/phase1/validator.md
index 15596edc6..ea69f0389 100644
--- a/specs/phase1/validator.md
+++ b/specs/phase1/validator.md
@@ -195,7 +195,10 @@ def get_best_light_client_aggregate(block: BeaconBlock,
                                     aggregates: Sequence[LightClientVote]) -> LightClientVote:
     viable_aggregates = [
         aggregate for aggregate in aggregates
-        if aggregate.data.slot == compute_previous_slot(block.slot) and aggregate.data.beacon_block_root == block.parent_root
+        if (
+            aggregate.data.slot == compute_previous_slot(block.slot)
+            and aggregate.data.beacon_block_root == block.parent_root
+        )
     ]
 
     return max(