diff --git a/beacon_chain/el/el_manager.nim b/beacon_chain/el/el_manager.nim
index edd3416a5..47bef8140 100644
--- a/beacon_chain/el/el_manager.nim
+++ b/beacon_chain/el/el_manager.nim
@@ -16,7 +16,6 @@ import
   eth/common/[eth_types, transaction],
   eth/async_utils, results,
   stew/[assign2, byteutils, objects],
-  eth/async_utils, stew/[assign2, byteutils, objects],
   # Local modules:
   ../spec/[eth2_merkleization, forks, helpers],
   ../networking/network_metadata,
diff --git a/beacon_chain/spec/validator.nim b/beacon_chain/spec/validator.nim
index 7ded3eb72..d77a5d1db 100644
--- a/beacon_chain/spec/validator.nim
+++ b/beacon_chain/spec/validator.nim
@@ -461,7 +461,7 @@ func is_aggregator*(committee_len: uint64, slot_signature: ValidatorSig): bool =
   bytes_to_uint64(eth2digest(
     slot_signature.toRaw()).data.toOpenArray(0, 7)) mod modulo == 0
 
-# https://github.com/ethereum/builder-specs/pull/47
+# https://github.com/ethereum/builder-specs/blob/v0.4.0/specs/bellatrix/validator.md#liveness-failsafe
 func livenessFailsafeInEffect*(
     block_roots: array[Limit SLOTS_PER_HISTORICAL_ROOT, Eth2Digest],
     slot: Slot): bool =