diff --git a/pkgs/by-name/li/libptytty/package.nix b/pkgs/by-name/li/libptytty/package.nix
index 8c2308d6fa0b..098616083aac 100644
--- a/pkgs/by-name/li/libptytty/package.nix
+++ b/pkgs/by-name/li/libptytty/package.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation (finalAttrs: {
   version = "2.0";
 
   src = fetchurl {
-    url = "http://dist.schmorp.de/libptytty/libptytty-${finalAttrs.version}.tar.gz";
+    url = "https://dist.schmorp.de/libptytty/libptytty-${finalAttrs.version}.tar.gz";
     sha256 = "1xrikmrsdkxhdy9ggc0ci6kg5b1hn3bz44ag1mk5k1zjmlxfscw0";
   };