diff --git a/pkgs/development/libraries/monocypher/default.nix b/pkgs/development/libraries/monocypher/default.nix
index 7ce84cbba835..b37cfffabc0e 100644
--- a/pkgs/development/libraries/monocypher/default.nix
+++ b/pkgs/development/libraries/monocypher/default.nix
@@ -2,23 +2,13 @@
 
 stdenv.mkDerivation rec {
   pname = "monocypher";
-  version = "3.1.3";
+  version = "4.0.2";
 
   src = fetchurl {
     url = "https://monocypher.org/download/monocypher-${version}.tar.gz";
-    hash = "sha256-tEK1d98o+MNsqgHZrpARtd2ccX2UvlIBaKBONtf1AW4=";
+    hash = "sha256-ONBxeXOMDJBnfbo863p7hJa8/qdYuhpT6AP+0wrgh5w=";
   };
 
-  patches = [
-    # Fix cross-compilation
-    (fetchpatch {
-      url = "https://github.com/LoupVaillant/Monocypher/commit/376715e1c0ebb375e50dfa757bc89486c9a7b404.patch";
-      hash = "sha256-tuwSUaU4w+jkaj10ChMgUmOQmoKYnv5JgJ1og8EXxFk=";
-    })
-  ];
-
-  makeFlags = [ "AR:=$(AR)" "CC:=$(CC)" ];
-
   installFlags = [ "PREFIX=$(out)" ];
 
   doCheck = true;