diff --git a/Cargo.lock b/Cargo.lock
index 177e2067..63a5ac2a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2776,9 +2776,9 @@ dependencies = [
 
 [[package]]
 name = "serde-big-array"
-version = "0.3.0"
+version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "52309f7932ab258e58bcf73cc89037e307ffef3bcfb7ce7a246580c26f81dc55"
+checksum = "14f791855a30ea300749cd42f29761707665a2166c8550be67adbfeb78c62195"
 dependencies = [
  "serde",
  "serde_derive",
diff --git a/zebra-chain/Cargo.toml b/zebra-chain/Cargo.toml
index 22f8c207..15011945 100644
--- a/zebra-chain/Cargo.toml
+++ b/zebra-chain/Cargo.toml
@@ -29,7 +29,7 @@ rand_core = "0.5.1"
 ripemd160 = "0.8.0"
 secp256k1 = { version = "0.19.0", features = ["serde"] }
 serde = { version = "1", features = ["serde_derive", "rc"] }
-serde-big-array = "0.3.0"
+serde-big-array = "0.3.1"
 sha2 = { version = "0.9.2", features=["compress"] }
 thiserror = "1"
 x25519-dalek = { version = "1.1", features = ["serde"] }