diff --git a/pkgs/by-name/ma/maelstrom/package.nix b/pkgs/by-name/ma/maelstrom/package.nix
index 339242a44c00..3a58566d423a 100644
--- a/pkgs/by-name/ma/maelstrom/package.nix
+++ b/pkgs/by-name/ma/maelstrom/package.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation (finalAttrs: {
   version = "3.0.7";
 
   src = fetchurl {
-    url = "http://www.libsdl.org/projects/Maelstrom/src/Maelstrom-${finalAttrs.version}.tar.gz";
+    url = "https://www.libsdl.org/projects/Maelstrom/src/Maelstrom-${finalAttrs.version}.tar.gz";
     sha256 = "0dm0m5wd7amrsa8wnrblkv34sq4v4lglc2wfx8klfkdhyhi06s4k";
   };