1 files changed, 1 insertions, 1 deletions
diff --git a/pkgs/applications/audio/pd-plugins/helmholtz/default.nix b/pkgs/applications/audio/pd-plugins/helmholtz/default.nix
index 3670fb8347d..faa914e1328 100644
--- a/pkgs/applications/audio/pd-plugins/helmholtz/default.nix
+++ b/pkgs/applications/audio/pd-plugins/helmholtz/default.nix
@@ -4,7 +4,7 @@ stdenv.mkDerivation rec {
   name = "helmholtz";
 
   src = fetchurl {
-    url = "http://www.katjaas.nl/helmholtz/helmholtz~.zip";
+    url = "https://www.katjaas.nl/helmholtz/helmholtz~.zip";
     name = "helmholtz.zip";
     curlOpts = "--user-agent ''";
     sha256 = "0h1fj7lmvq9j6rmw33rb8k0byxb898bi2xhcwkqalb84avhywgvs";