diff --git a/gnu/packages/package-management.scm b/gnu/packages/package-management.scm
index d77b9010fa..f38eb8ca85 100644
--- a/gnu/packages/package-management.scm
+++ b/gnu/packages/package-management.scm
@@ -569,7 +569,7 @@ out) and returning a package that uses that as its 'source'."
     (version "2.3.7")
     (source (origin
              (method url-fetch)
-             (uri (string-append "http://nixos.org/releases/nix/nix-"
+             (uri (string-append "https://nixos.org/releases/nix/nix-"
                                  version "/nix-" version ".tar.xz"))
              (sha256
               (base32