diff --git a/pkgs/tools/security/mkp224o/default.nix b/pkgs/tools/security/mkp224o/default.nix
index 4b9beecb3541..bc51d9bdca2f 100644
--- a/pkgs/tools/security/mkp224o/default.nix
+++ b/pkgs/tools/security/mkp224o/default.nix
@@ -2,13 +2,13 @@
 
 stdenv.mkDerivation rec {
   pname = "mkp224o";
-  version = "1.5.0";
+  version = "1.6.1";
 
   src = fetchFromGitHub {
     owner = "cathugger";
     repo = "mkp224o";
     rev = "v${version}";
-    sha256 = "0b2cn96wg4l8jkkqqp8l2295xlmm2jc8nrw6rdqb5g0zkpfmrxbb";
+    sha256 = "sha256-+TJ137DmgaFZX+/N6VwXJwfVCoTWtC8NqfXfYJC8UHo=";
   };
 
   buildCommand =