diff --git a/Cargo.lock b/Cargo.lock
index 93f90772..4d86b7dd 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -268,9 +268,9 @@ dependencies = [
 
 [[package]]
 name = "blake2b_simd"
-version = "0.5.10"
+version = "0.5.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d8fb2d74254a3a0b5cac33ac9f8ed0e44aa50378d9dbb2e5d83bd21ed1dc2c8a"
+checksum = "afa748e348ad3be8263be728124b24a24f268266f6f5d58af9d75f6a40b5c587"
 dependencies = [
  "arrayref",
  "arrayvec 0.5.1",
diff --git a/zebra-chain/Cargo.toml b/zebra-chain/Cargo.toml
index 63a6cbd5..4c98a71f 100644
--- a/zebra-chain/Cargo.toml
+++ b/zebra-chain/Cargo.toml
@@ -15,7 +15,7 @@ proptest-impl = ["proptest", "proptest-derive"]
 [dependencies]
 bech32 = "0.7.2"
 bitvec = "0.17.4"
-blake2b_simd = "0.5.10"
+blake2b_simd = "0.5.11"
 blake2s_simd = "0.5.11"
 bs58 = { version = "0.3", features = ["check"] }
 byteorder = "1.3"