diff --git a/pkgs/tools/misc/timidity/default.nix b/pkgs/tools/misc/timidity/default.nix
index c139d741fab2..a6c2349bef13 100644
--- a/pkgs/tools/misc/timidity/default.nix
+++ b/pkgs/tools/misc/timidity/default.nix
@@ -97,7 +97,7 @@ stdenv.mkDerivation rec {
   ];
 
   instruments = fetchurl {
-    url = "http://www.csee.umbc.edu/pub/midia/instruments.tar.gz";
+    url = "https://courses.cs.umbc.edu/pub/midia/instruments.tar.gz";
     sha256 = "0lsh9l8l5h46z0y8ybsjd4pf6c22n33jsjvapfv3rjlfnasnqw67";
   };