diff --git a/pkgs/by-name/sf/sfxr/package.nix b/pkgs/by-name/sf/sfxr/package.nix
index 9fdf777c8165..769c0b589f9b 100644
--- a/pkgs/by-name/sf/sfxr/package.nix
+++ b/pkgs/by-name/sf/sfxr/package.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation (finalAttrs: {
   version = "1.2.1";
 
   src = fetchurl {
-    url = "http://www.drpetter.se/files/sfxr-sdl-${finalAttrs.version}.tar.gz";
+    url = "https://www.drpetter.se/files/sfxr-sdl-${finalAttrs.version}.tar.gz";
     sha256 = "0dfqgid6wzzyyhc0ha94prxax59wx79hqr25r6if6by9cj4vx4ya";
   };