diff --git a/Cargo.lock b/Cargo.lock
index 8ea3c160..f955081d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -397,9 +397,9 @@ checksum = "41aa2ec95ca3b5c54cf73c91acf06d24f4495d5f1b1c12506ae3483d646177ac"
 
 [[package]]
 name = "byteorder"
-version = "1.3.4"
+version = "1.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "08c48aae112d48ed9f069b33538ea9e3e90aa263cfa3d1c24309612b1f7472de"
+checksum = "ae44d1a3d5a19df61dd0c8beb138458ac2a53a7ac09eba97d55592540004306b"
 
 [[package]]
 name = "bytes"
diff --git a/zebra-chain/Cargo.toml b/zebra-chain/Cargo.toml
index a3e8a4c0..23c22274 100644
--- a/zebra-chain/Cargo.toml
+++ b/zebra-chain/Cargo.toml
@@ -18,7 +18,7 @@ bitvec = "0.17.4"
 blake2b_simd = "0.5.11"
 blake2s_simd = "0.5.11"
 bs58 = { version = "0.4", features = ["check"] }
-byteorder = "1.3"
+byteorder = "1.4"
 chrono = { version = "0.4", features = ["serde"] }
 futures = "0.3"
 hex = "0.4"
diff --git a/zebra-network/Cargo.toml b/zebra-network/Cargo.toml
index 9fa0b82f..f4e69afa 100644
--- a/zebra-network/Cargo.toml
+++ b/zebra-network/Cargo.toml
@@ -9,7 +9,7 @@ edition = "2018"
 
 [dependencies]
 bitflags = "1.2"
-byteorder = "1.3"
+byteorder = "1.4"
 bytes = "0.6"
 chrono = "0.4"
 hex = "0.4"