diff --git a/pkgs/by-name/cl/cl-launch/package.nix b/pkgs/by-name/cl/cl-launch/package.nix
index a43b56dac306..5b8e9eabb12f 100644
--- a/pkgs/by-name/cl/cl-launch/package.nix
+++ b/pkgs/by-name/cl/cl-launch/package.nix
@@ -8,7 +8,7 @@ stdenv.mkDerivation (finalAttrs: {
   version = "4.1.4.1";
 
   src = fetchurl {
-    url = "http://common-lisp.net/project/xcvb/cl-launch/cl-launch-${finalAttrs.version}.tar.gz";
+    url = "https://common-lisp.net/project/xcvb/cl-launch/cl-launch-${finalAttrs.version}.tar.gz";
     sha256 = "sha256-v5aURs2Verhn2HmGiijvY9br20OTPFrOGBWsb6cHhSQ=";
   };