diff --git a/polkadot/Cargo.lock b/polkadot/Cargo.lock
index 02c0804b77..829c81dc64 100644
--- a/polkadot/Cargo.lock
+++ b/polkadot/Cargo.lock
@@ -4403,9 +4403,9 @@ dependencies = [
 
 [[package]]
 name = "nix"
-version = "0.19.1"
+version = "0.20.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b2ccba0cfe4fdf15982d1674c69b1fd80bad427d293849982668dfe454bd61f2"
+checksum = "fa9b4819da1bc61c0ea48b63b7bc8604064dd43013e7cc325df098d49cd7c18a"
 dependencies = [
  "bitflags",
  "cc",
diff --git a/polkadot/Cargo.toml b/polkadot/Cargo.toml
index 1a8407e53a..df4c213640 100644
--- a/polkadot/Cargo.toml
+++ b/polkadot/Cargo.toml
@@ -18,7 +18,7 @@ parity-util-mem = { version = "*", default-features = false, features = ["jemall
 
 [dev-dependencies]
 assert_cmd = "1.0.2"
-nix = "0.19.1"
+nix = "0.20.0"
 tempfile = "3.2.0"
 
 [workspace]