diff --git a/specs/core/0_beacon-chain.md b/specs/core/0_beacon-chain.md
index 60bacba63..641ad02ca 100644
--- a/specs/core/0_beacon-chain.md
+++ b/specs/core/0_beacon-chain.md
@@ -707,10 +707,10 @@ def shuffle(values: List[Any], seed: Bytes32) -> List[Any]:
     indices = list(range(len(values)))
     for round in range(90):
         hashvalues = b''.join([
-            hash(seed + round.to_bytes(1, 'big') + i.to_bytes(4, 'big'))
+            hash(seed + round.to_bytes(1, 'little') + i.to_bytes(4, 'little'))
             for i in range((len(values) + 255) // 256)
         ])
-        pivot = int.from_bytes(hash(seed + round.to_bytes(1, 'big')), 'big') % n
+        pivot = int.from_bytes(hash(seed + round.to_bytes(1, 'little')), 'little') % n
         def permute(pos):
             flip = (pivot - pos) % n
             maxpos = max(pos, flip)