diff --git a/utils/phase0/hash_function.py b/utils/phase0/hash_function.py
index 21e6555bf..3fee63d82 100644
--- a/utils/phase0/hash_function.py
+++ b/utils/phase0/hash_function.py
@@ -1,7 +1,6 @@
-# from hashlib import sha256
-from eth_utils import keccak
+from hashlib import sha256
+# from eth_utils import keccak
 
 
-# def hash(x): return sha256(x).digest()
-def hash(x):
-    return keccak(x)
+def hash(x): return sha256(x).digest()
+# def hash(x):  return keccak(x)