diff --git a/pkgs/tools/text/hck/default.nix b/pkgs/tools/text/hck/default.nix
index 271e4d9b7168..ede4746e1d0b 100644
--- a/pkgs/tools/text/hck/default.nix
+++ b/pkgs/tools/text/hck/default.nix
@@ -1,7 +1,7 @@
-{ cmake
-, fetchFromGitHub
-, lib
+{ lib
 , rustPlatform
+, fetchFromGitHub
+, cmake
 , stdenv
 , libiconv
 , CoreFoundation
@@ -10,16 +10,16 @@
 
 rustPlatform.buildRustPackage rec {
   pname = "hck";
-  version = "0.6.3";
+  version = "0.6.4";
 
   src = fetchFromGitHub {
     owner = "sstadick";
     repo = pname;
     rev = "v${version}";
-    sha256 = "02yvpgvzdprysg0spa0abn7d3vjj5spzc3528rwbpl4cw2yx8j6w";
+    sha256 = "sha256-nEWU4L1704g+0QNCOHEWDrw5U587RLv+WG6v9/5E650=";
   };
 
-  cargoSha256 = "0n6wywb1xyaxkbr0fs39992dfv55wzvp05i1vk9mxgnsim9s7aw8";
+  cargoSha256 = "sha256-JSnikt00yOcIB6CuLUgphRS9JTMWo3MtAOya4M9E6kI=";
 
   nativeBuildInputs = [ cmake ];