diff --git a/Cargo.lock b/Cargo.lock
index 9cf420ef8..0211cb307 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1205,9 +1205,9 @@ checksum = "e4a24736216ec316047a1fc4252e27dabb04218aa4a3f37c6e7ddbf1f9782b54"
 
 [[package]]
 name = "num-bigint"
-version = "0.4.2"
+version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "74e768dff5fb39a41b3bcd30bb25cf989706c90d028d1ad71971987aa309d535"
+checksum = "f93ab6289c7b344a8a9f60f88d80aa20032336fe78da341afc91c8a2341fc75f"
 dependencies = [
  "autocfg 1.0.1",
  "num-integer",
diff --git a/Cargo.toml b/Cargo.toml
index 12e06a96f..afd9790d5 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,7 +13,7 @@ lalrpop = { version = "0.18.1", features = ["lexer"] }
 lalrpop-util = "0.18.1"
 regex = "1"
 rand = { version = "0.8.4", features = ["small_rng"] }
-num-bigint = { version = "0.4.2", features = ["rand"] }
+num-bigint = { version = "0.4.3", features = ["rand"] }
 num-traits = "0.2.11"
 serde = { version = "1.0", features = ["derive", "rc"] }
 serde_repr = "0.1.6"