diff --git a/Cargo.lock b/Cargo.lock
index 845166f..292d12c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -218,9 +218,9 @@ dependencies = [
 
 [[package]]
 name = "num-bigint"
-version = "0.4.1"
+version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "76e97c412795abf6c24ba30055a8f20642ea57ca12875220b854cfa501bf1e48"
+checksum = "f93ab6289c7b344a8a9f60f88d80aa20032336fe78da341afc91c8a2341fc75f"
 dependencies = [
  "autocfg",
  "num-integer",