diff --git a/pkgs/by-name/ud/udns/package.nix b/pkgs/by-name/ud/udns/package.nix
index eef01290d940..96777492343b 100644
--- a/pkgs/by-name/ud/udns/package.nix
+++ b/pkgs/by-name/ud/udns/package.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation (finalAttrs: {
   buildPhase = "make staticlib sharedlib rblcheck_s dnsget_s";
 
   src = fetchurl {
-    url = "http://www.corpit.ru/mjt/udns/udns-${finalAttrs.version}.tar.gz";
+    url = "https://www.corpit.ru/mjt/udns/udns-${finalAttrs.version}.tar.gz";
     sha256 = "sha256-aWotDVGNqYXZdaZeEdFm8/V829HUI3aguFMH9JYBxug=";
   };