diff --git a/beacon_chain/spec/crypto.nim b/beacon_chain/spec/crypto.nim
index 9866aecaf..80a9b8897 100644
--- a/beacon_chain/spec/crypto.nim
+++ b/beacon_chain/spec/crypto.nim
@@ -84,7 +84,7 @@ template `==`*[N, T](a: T, b: BlsValue[N, T]): bool =
 
 # API
 # ----------------------------------------------------------------------
-# https://github.com/ethereum/eth2.0-specs/blob/v0.10.1/specs/phase0/beacon-chain.md#bls-signatures
+# https://github.com/ethereum/eth2.0-specs/blob/v0.11.1/specs/phase0/beacon-chain.md#bls-signatures
 
 func toPubKey*(privkey: ValidatorPrivKey): ValidatorPubKey =
   ## Create a private key from a public key
@@ -112,7 +112,7 @@ func aggregate*(x: var ValidatorSig, other: ValidatorSig) =
   ## This assumes that they are real signatures
   x.blsValue.aggregate(other.blsValue)
 
-# https://github.com/ethereum/eth2.0-specs/blob/v0.10.1/specs/phase0/beacon-chain.md#bls-signatures
+# https://github.com/ethereum/eth2.0-specs/blob/v0.11.1/specs/phase0/beacon-chain.md#bls-signatures
 func blsVerify*(
     pubkey: ValidatorPubKey, message: openArray[byte],
     signature: ValidatorSig): bool =
diff --git a/benchmarks/bench_bls_sig_agggregation.nim b/benchmarks/bench_bls_sig_agggregation.nim
index faefbcd63..1687536fc 100644
--- a/benchmarks/bench_bls_sig_agggregation.nim
+++ b/benchmarks/bench_bls_sig_agggregation.nim
@@ -138,7 +138,7 @@ proc main(nb_samples: Natural) =
     for i in 0 ..< proof_of_possessions.len:
       pop_valid = pop_valid and proof_of_possessions[i].verifyPoP(pubkeys[i])
 
-  # TODO: update with IETF API (Eth2 v0.10.1)
+  # TODO: update with IETF API (Eth2 v0.11.1)
   # func fastAggregateVerify*[T: byte|char](
   #       publicKeys: openarray[PublicKey],
   #       message: openarray[T],