diff --git a/pkgs/rosenpass.nix b/pkgs/rosenpass.nix
index ff4e0ec..37b467d 100644
--- a/pkgs/rosenpass.nix
+++ b/pkgs/rosenpass.nix
@@ -57,6 +57,7 @@ rustPlatform.buildRustPackage {
     outputHashes = {
       "memsec-0.6.3" = "sha256-4ri+IEqLd77cLcul3lZrmpDKj4cwuYJ8oPRAiQNGeLw=";
       "uds-0.4.2" = "sha256-qlxr/iJt2AV4WryePIvqm/8/MK/iqtzegztNliR93W8=";
+      "libcrux-blake2-0.0.3-pre" = "sha256-0CLjuzwJqGooiODOHf5D8Hc8ClcG/XcGvVGyOVnLmJY=";
     };
   };