diff --git a/Cargo.lock b/Cargo.lock
index 3ceb702cfcef32aeb128987b2d21411914300829..2eeef87ff434de2f3aebfc660d99dcf0694ee8b0 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4067,11 +4067,12 @@ dependencies = [
 
 [[package]]
 name = "which"
-version = "4.1.0"
+version = "4.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b55551e42cbdf2ce2bedd2203d0cc08dba002c27510f86dab6d0ce304cba3dfe"
+checksum = "7cc009ab82a2afc94b9e467ab4214aee9cad1356cd9191264203d7d72006e00d"
 dependencies = [
  "either",
+ "lazy_static",
  "libc",
 ]
 
diff --git a/Cargo.toml b/Cargo.toml
index 83e2d83cdd4af9cdbb1bf088c8a8b260d32f732f..14b135c55574f12f2d00973438089cf16b375e61 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -28,7 +28,7 @@ zip = { version = "0.5.13", default-features = false }
 parity-wasm = "0.42.2"
 cargo_metadata = "0.14.0"
 codec = { package = "parity-scale-codec", version = "2.1", features = ["derive"] }
-which = "4.1.0"
+which = "4.2.1"
 colored = "2.0.0"
 toml = "0.5.8"
 rustc_version = "0.4.0"