diff --git a/gnu/packages/ncurses.scm b/gnu/packages/ncurses.scm
index e314ab22fbbe75de37dbc560da3f14bb4a4d1db9..ae3fb887e8a641960a0774e789560ad52f327130 100644
--- a/gnu/packages/ncurses.scm
+++ b/gnu/packages/ncurses.scm
@@ -233,7 +233,7 @@ (define-public dialog
     (source (origin
               (method url-fetch)
               (uri (string-append
-                    "http://invisible-mirror.net/archives/dialog/dialog-"
+                    "https://invisible-mirror.net/archives/dialog/dialog-"
                     version ".tgz"))
               (sha256
                (base32