diff --git a/Cargo.lock b/Cargo.lock
index 970f5f5..aacad18 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1144,9 +1144,9 @@ dependencies = [
 
 [[package]]
 name = "num-bigint"
-version = "0.4.1"
+version = "0.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "76e97c412795abf6c24ba30055a8f20642ea57ca12875220b854cfa501bf1e48"
+checksum = "74e768dff5fb39a41b3bcd30bb25cf989706c90d028d1ad71971987aa309d535"
 dependencies = [
  "autocfg",
  "num-integer",
diff --git a/Cargo.toml b/Cargo.toml
index 4698404..5cee830 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -30,7 +30,7 @@ serde_json = "1.0.67"
 bincode = "1.3.3"
 serde_cbor = "0.11.2"
 base64 = "0.13.0"
-num-bigint = "0.4.1"
+num-bigint = "0.4.2"
 num-traits = "0.2.14"
 chrono = { version = "0.4.19", features = ["serde"] }
 rand = { version = "0.8.4", package = "rand" }