diff --git a/pkgs/development/tools/rust/cargo-careful/default.nix b/pkgs/development/tools/rust/cargo-careful/default.nix
index d64aeb320d97..9d4aa2d95600 100644
--- a/pkgs/development/tools/rust/cargo-careful/default.nix
+++ b/pkgs/development/tools/rust/cargo-careful/default.nix
@@ -5,16 +5,16 @@
 
 rustPlatform.buildRustPackage rec {
   pname = "cargo-careful";
-  version = "0.3.4";
+  version = "0.4.0";
 
   src = fetchFromGitHub {
     owner = "RalfJung";
     repo = "cargo-careful";
     rev = "v${version}";
-    hash = "sha256-BW1Q54DlEAle4iVUXvKdz5PRhdWe736K7yo/KRKAUys=";
+    hash = "sha256-5FteKVlEx5NSj3lzRRj3qerkyK+UdJfTWtG6xEzI4t4=";
   };
 
-  cargoHash = "sha256-r5dCJT0tDo+IlDpVV90eGswIKLEWuSCogiS9Qvch2tA=";
+  cargoHash = "sha256-gs8o+tWvC4cgIITpfvJqfTquyYaEbvNMeZEJKFzd83I=";
 
   meta = with lib; {
     description = "A tool to execute Rust code carefully, with extra checking along the way";