diff --git a/pkgs/by-name/mo/monocypher/package.nix b/pkgs/by-name/mo/monocypher/package.nix
index f2df4a3d8770..c5b559f60aaf 100644
--- a/pkgs/by-name/mo/monocypher/package.nix
+++ b/pkgs/by-name/mo/monocypher/package.nix
@@ -6,11 +6,11 @@
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "monocypher";
-  version = "4.0.2";
+  version = "4.0.3";
 
   src = fetchurl {
     url = "https://monocypher.org/download/monocypher-${finalAttrs.version}.tar.gz";
-    hash = "sha256-ONBxeXOMDJBnfbo863p7hJa8/qdYuhpT6AP+0wrgh5w=";
+    hash = "sha256-jMm8NBpmJJAW25vXDpFC2NCu+ZRZc3RLGsBdvFXY7mY=";
   };
 
   installFlags = [ "PREFIX=$(out)" ];