diff --git a/pkgs/by-name/mo/mopac/package.nix b/pkgs/by-name/mo/mopac/package.nix
index 180a4a692986..24406e3a619a 100644
--- a/pkgs/by-name/mo/mopac/package.nix
+++ b/pkgs/by-name/mo/mopac/package.nix
@@ -13,13 +13,13 @@ assert blas.isILP64 == lapack.isILP64;
 
 stdenv.mkDerivation rec {
   pname = "mopac";
-  version = "23.2";
+  version = "23.2.1";
 
   src = fetchFromGitHub {
     owner = "openmopac";
     repo = "mopac";
     rev = "v${version}";
-    hash = "sha256-P2BEXzclHJHSoaIIgCKVC3j63Af+J6rO0acwjv9ybbA=";
+    hash = "sha256-2+6mIxawYOqgsKRWDBLXMhP53VJTTGFN4AKunq4YD4o=";
   };
 
   nativeBuildInputs = [