diff --git a/pkgs/by-name/mb/mbuffer/package.nix b/pkgs/by-name/mb/mbuffer/package.nix
index 274fb3d667e1..fb5cd95a5efa 100644
--- a/pkgs/by-name/mb/mbuffer/package.nix
+++ b/pkgs/by-name/mb/mbuffer/package.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation (finalAttrs: {
   ];
 
   src = fetchurl {
-    url = "http://www.maier-komor.de/software/mbuffer/mbuffer-${finalAttrs.version}.tgz";
+    url = "https://www.maier-komor.de/software/mbuffer/mbuffer-${finalAttrs.version}.tgz";
     sha256 = "sha256-R+UWtBFgOZlnN8T4iV9m563iS37sXpN1SGY3psirNgE=";
   };