diff --git a/bindings/python/Cargo.lock b/bindings/python/Cargo.lock
index a7672d6..28ad108 100644
--- a/bindings/python/Cargo.lock
+++ b/bindings/python/Cargo.lock
@@ -214,9 +214,9 @@ checksum = "3eaf3ede3fee6db1a4c2ee091bf8a8b4dccdc6d17f656fb07896ee72867612f2"
 
 [[package]]
 name = "num-bigint"
-version = "0.4.8"
+version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c89e69e7e0f03bea5ef08013795c25018e101932225a656383bd384495ecc367"
+checksum = "93e7820bc0a80a0238e650327316f929ba18d5be054b647490a3a6a339f3e7c0"
 dependencies = [
  "num-integer",
  "num-traits",
diff --git a/crates/Cargo.toml b/crates/Cargo.toml
index d2ba1eb..ad1b111 100644
--- a/crates/Cargo.toml
+++ b/crates/Cargo.toml
@@ -19,7 +19,7 @@ blake2 = "0.10"
 sha2 = "0.10"
 ed25519-dalek = { version = "2", features = ["rand_core"] }
 rand_core = { version = "0.6", features = ["getrandom"] }
-num-bigint = "0.4"
+num-bigint = "0.5"
 thiserror = "2"
 hex = "0.4"
 serde_json = "1"