diff --git a/pkgs/by-name/bi/bibclean/package.nix b/pkgs/by-name/bi/bibclean/package.nix
index 23a04a34fabe..82669b8dda64 100644
--- a/pkgs/by-name/bi/bibclean/package.nix
+++ b/pkgs/by-name/bi/bibclean/package.nix
@@ -9,7 +9,7 @@ stdenv.mkDerivation (finalAttrs: {
   version = "3.07";
 
   src = fetchurl {
-    url = "http://ftp.math.utah.edu/pub/bibclean/bibclean-${finalAttrs.version}.tar.xz";
+    url = "https://ftp.math.utah.edu/pub/bibclean/bibclean-${finalAttrs.version}.tar.xz";
     sha256 = "sha256-kZM2eC6ePCBOYPVkhf0fjdZ562IvyP0fSDNZXuEBkaY=";
   };