diff --git a/pkgs/tools/networking/curl/default.nix b/pkgs/tools/networking/curl/default.nix
index 16b22e3f2554..dbe2a6639352 100644
--- a/pkgs/tools/networking/curl/default.nix
+++ b/pkgs/tools/networking/curl/default.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation rec {
   name = "curl-7.58.0";
 
   src = fetchurl {
-    url = "http://curl.haxx.se/download/${name}.tar.bz2";
+    url = "https://curl.haxx.se/download/${name}.tar.bz2";
     sha256 = "0cg7klhf1ksnbw5wvwa802qir877zv4y3dj7swz1xh07g3wq3c0w";
   };