diff --git a/Cargo.lock b/Cargo.lock
index 62ce3d9a4..6daf863eb 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -246,7 +246,7 @@ dependencies = [
  "getrandom 0.4.2",
  "hex-literal",
  "hybrid-array",
- "num-bigint",
+ "num-bigint 0.5.1",
  "num-integer",
  "num-modular",
  "num-traits",
@@ -463,9 +463,19 @@ checksum = "f8ca58f447f06ed17d5fc4043ce1b10dd205e060fb3ce5b979b8ed8e59ff3f79"
 
 [[package]]
 name = "num-bigint"
-version = "0.4.6"
+version = "0.4.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a5e44f723f1133c9deac646763579fdb3ac745e418f2a7af9cd0c431da1f20b9"
+checksum = "c89e69e7e0f03bea5ef08013795c25018e101932225a656383bd384495ecc367"
+dependencies = [
+ "num-integer",
+ "num-traits",
+]
+
+[[package]]
+name = "num-bigint"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "93e7820bc0a80a0238e650327316f929ba18d5be054b647490a3a6a339f3e7c0"
 dependencies = [
  "num-integer",
  "num-traits",
@@ -486,7 +496,7 @@ version = "0.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "17bb261bf36fa7d83f4c294f834e91256769097b3cb505d44831e0a179ac647f"
 dependencies = [
- "num-bigint",
+ "num-bigint 0.4.8",
  "num-integer",
  "num-traits",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index 91a3c80aa..e88afdf59 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -35,7 +35,7 @@ zeroize = { version = "1", optional = true, default-features = false }
 [dev-dependencies]
 chacha20 = { version = "0.10", default-features = false, features = ["rng"] }
 hex-literal = "1"
-num-bigint = "0.4"
+num-bigint = "0.5"
 num-integer = "0.1"
 num-modular = { version = "0.6", features = ["num-bigint", "num-integer", "num-traits"] }
 rand_core = "0.10"