diff --git a/specs/phase1/custody-game.md b/specs/phase1/custody-game.md
index 4cf047405..9b20dea55 100644
--- a/specs/phase1/custody-game.md
+++ b/specs/phase1/custody-game.md
@@ -368,7 +368,6 @@ def process_chunk_challenge(state: BeaconState, challenge: CustodyChunkChallenge
 ```python
 def process_chunk_challenge_response(state: BeaconState,
                                      response: CustodyChunkResponse) -> None:
-
     # Get matching challenge (if any) from records
     matching_challenges = [
         record for record in state.custody_chunk_challenge_records