diff --git a/Cargo.lock b/Cargo.lock
index 6201eb39..29b3e810 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -411,18 +411,18 @@ checksum = "72936ee4afc7f8f736d1c38383b56480b5497b4617b4a77bdbf1d2ababc76127"
 dependencies = [
  "arrayref",
  "arrayvec",
- "constant_time_eq",
+ "constant_time_eq 0.1.5",
 ]
 
 [[package]]
 name = "blake2s_simd"
-version = "1.0.0"
+version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "db539cc2b5f6003621f1cd9ef92d7ded8ea5232c7de0f9faa2de251cd98730d4"
+checksum = "6637f448b9e61dfadbdcbae9a885fadee1f3eaffb1f8d3c1965d3ade8bdfd44f"
 dependencies = [
  "arrayref",
  "arrayvec",
- "constant_time_eq",
+ "constant_time_eq 0.2.4",
 ]
 
 [[package]]
@@ -846,6 +846,12 @@ version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "245097e9a4535ee1e3e3931fcfcd55a796a44c643e8596ff6566d68f09b87bbc"
 
+[[package]]
+name = "constant_time_eq"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f3ad85c1f65dc7b37604eb0e89748faf0b9653065f2a8ef69f96a687ec1e9279"
+
 [[package]]
 name = "core-foundation"
 version = "0.9.3"
diff --git a/zebra-chain/Cargo.toml b/zebra-chain/Cargo.toml
index 3914e057..fd3c3ca0 100644
--- a/zebra-chain/Cargo.toml
+++ b/zebra-chain/Cargo.toml
@@ -38,7 +38,7 @@ bech32 = "0.9.1"
 bitvec = "1.0.1"
 bitflags = "1.3.2"
 blake2b_simd = "1.0.0"
-blake2s_simd = "1.0.0"
+blake2s_simd = "1.0.1"
 bls12_381 = "0.7.0"
 bs58 = { version = "0.4.0", features = ["check"] }
 byteorder = "1.4.3"