diff --git a/pkgs/by-name/li/libasyncns/package.nix b/pkgs/by-name/li/libasyncns/package.nix
index 91cab5cc4bea..2ead8a3d208a 100644
--- a/pkgs/by-name/li/libasyncns/package.nix
+++ b/pkgs/by-name/li/libasyncns/package.nix
@@ -9,7 +9,7 @@ stdenv.mkDerivation (finalAttrs: {
   version = "0.8";
 
   src = fetchurl {
-    url = "http://0pointer.de/lennart/projects/libasyncns/libasyncns-${finalAttrs.version}.tar.gz";
+    url = "https://0pointer.de/lennart/projects/libasyncns/libasyncns-${finalAttrs.version}.tar.gz";
     sha256 = "0x5b6lcic4cd7q0bx00x93kvpyzl7n2abbgvqbrlzrfb8vknc6jg";
   };