diff --git a/pkgs/tools/security/b3sum/default.nix b/pkgs/tools/security/b3sum/default.nix
index fa7b9e4e5c9c..dc074a5616af 100644
--- a/pkgs/tools/security/b3sum/default.nix
+++ b/pkgs/tools/security/b3sum/default.nix
@@ -2,14 +2,14 @@
 
 rustPlatform.buildRustPackage rec {
   pname = "b3sum";
-  version = "1.3.3";
+  version = "1.4.0";
 
   src = fetchCrate {
     inherit version pname;
-    sha256 = "sha256-PeH4oMeLxEM1pKqMsZBhsbmZOAVdLEmWKyPjuRNjowA=";
+    sha256 = "sha256-rh5xELjiwm5rSFVgIMZUMG4J/VxKKF8xrxX/wK+sVF8=";
   };
 
-  cargoSha256 = "sha256-dvxQY1KgZGOCIeFoxfOewF9gm9xORLelJxJMMtrNWDs=";
+  cargoHash = "sha256-q10NC3QH4+ExF4vO6j/Ud8LenzXIuhZC8Yyev+2gJNU=";
 
   meta = {
     description = "BLAKE3 cryptographic hash function";