diff --git a/Cargo.lock b/Cargo.lock
index 2013d424..9fb706e0 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -833,9 +833,9 @@ dependencies = [
 
 [[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/slh-dsa/Cargo.toml b/slh-dsa/Cargo.toml
index 9cb850e6..040ed295 100644
--- a/slh-dsa/Cargo.toml
+++ b/slh-dsa/Cargo.toml
@@ -38,7 +38,7 @@ cipher = "0.5"
 ctr = "0.10.0-rc.3"
 hex = { version = "0.4.1", features = ["serde"] }
 hex-literal = "1"
-num-bigint = "0.4.4"
+num-bigint = "0.5.1"
 paste = "1.0.15"
 pkcs8 = { version = "0.11", features = ["pem"] }
 proptest = "1.11.0"