diff --git a/specs/core/1_custody-game.md b/specs/core/1_custody-game.md
index d789a6855..0eea43dc0 100644
--- a/specs/core/1_custody-game.md
+++ b/specs/core/1_custody-game.md
@@ -77,7 +77,8 @@ This document details the beacon chain additions and changes in Phase 1 of Ether
 ## Constants
 
 ### Misc
-
+| Name | Value |
+| - | - |
 | `BLS12_381_Q` | `4002409555221667393417789825735904156556882819939007885332058136124031650490837864442687629129015664037894272559787` |
 | `MINOR_REWARD_QUOTIENT` | `2**8` (= 256) |
 
@@ -339,7 +340,7 @@ def legendre_bit(a: int, q: int) -> int:
 Given one proof of custody chunk, returns the proof of custody subchunks of the correct sizes.
 
 ```python
-def custody_subchunkify(bytez: bytes) -> list:
+def custody_subchunkify(bytez: bytes) -> Sequence[bytes]:
     bytez += b'\x00' * (-len(bytez) % BYTES_PER_CUSTODY_SUBCHUNK)
     return [bytez[i:i + BYTES_PER_CUSTODY_SUBCHUNK]
             for i in range(0, len(bytez), BYTES_PER_CUSTODY_SUBCHUNK)]