diff --git a/Cargo.lock b/Cargo.lock
index d9da80ad..c4d5c87b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -161,6 +161,17 @@ dependencies = [
  "constant_time_eq",
 ]
 
+[[package]]
+name = "blake2s_simd"
+version = "0.5.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ab9e07352b829279624ceb7c64adb4f585dacdb81d35cafae81139ccd617cf44"
+dependencies = [
+ "arrayref",
+ "arrayvec",
+ "constant_time_eq",
+]
+
 [[package]]
 name = "block-buffer"
 version = "0.7.3"
@@ -2049,6 +2060,7 @@ name = "zebra-chain"
 version = "0.1.0"
 dependencies = [
  "blake2b_simd",
+ "blake2s_simd",
  "bs58",
  "byteorder",
  "chrono",
diff --git a/zebra-chain/Cargo.toml b/zebra-chain/Cargo.toml
index 316ad68f..5454cd95 100644
--- a/zebra-chain/Cargo.toml
+++ b/zebra-chain/Cargo.toml
@@ -9,6 +9,7 @@ edition = "2018"
 
 [dependencies]
 blake2b_simd = "0.5.10"
+blake2s_simd = "0.5.10"
 bs58 = { version = "0.3", features = ["check"] }
 byteorder = "1.3"
 chrono = "0.4"