diff --git a/pkgs/tools/audio/abcmidi/default.nix b/pkgs/tools/audio/abcmidi/default.nix
index f0c1e35885b2..cfb5ff125e22 100644
--- a/pkgs/tools/audio/abcmidi/default.nix
+++ b/pkgs/tools/audio/abcmidi/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   pname = "abcMIDI";
-  version = "2021.04.26";
+  version = "2021.05.09";
 
   src = fetchzip {
     url = "https://ifdo.ca/~seymour/runabc/${pname}-${version}.zip";
-    sha256 = "sha256-L6SfPRVIclAVloYfZ+kKfZaGHYnYNAgToRN2e5ZfJZ4=";
+    sha256 = "sha256-LgtS7IOGkw0K70UAP2a57ghIiJujVnQO5+j4ZanPZp4=";
   };
 
   meta = with lib; {