diff --git a/Cargo.lock b/Cargo.lock
index d94622fc..93f90772 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -279,9 +279,9 @@ dependencies = [
 
 [[package]]
 name = "blake2s_simd"
-version = "0.5.10"
+version = "0.5.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ab9e07352b829279624ceb7c64adb4f585dacdb81d35cafae81139ccd617cf44"
+checksum = "9e461a7034e85b211a4acb57ee2e6730b32912b06c08cc242243c39fc21ae6a2"
 dependencies = [
  "arrayref",
  "arrayvec 0.5.1",
diff --git a/zebra-chain/Cargo.toml b/zebra-chain/Cargo.toml
index 61072ed7..63a6cbd5 100644
--- a/zebra-chain/Cargo.toml
+++ b/zebra-chain/Cargo.toml
@@ -16,7 +16,7 @@ proptest-impl = ["proptest", "proptest-derive"]
 bech32 = "0.7.2"
 bitvec = "0.17.4"
 blake2b_simd = "0.5.10"
-blake2s_simd = "0.5.10"
+blake2s_simd = "0.5.11"
 bs58 = { version = "0.3", features = ["check"] }
 byteorder = "1.3"
 chrono = { version = "0.4", features = ["serde"] }