diff --git a/gnu/packages/ncurses.scm b/gnu/packages/ncurses.scm
index e314ab22fb..ae3fb887e8 100644
--- a/gnu/packages/ncurses.scm
+++ b/gnu/packages/ncurses.scm
@@ -233,7 +233,7 @@ ncursesw library provides wide character support.")
     (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