diff --git a/byacc/trunk/PKGBUILD b/byacc/trunk/PKGBUILD
index 530ef158a3a..0cbfcd6077e 100644
--- a/byacc/trunk/PKGBUILD
+++ b/byacc/trunk/PKGBUILD
@@ -13,7 +13,7 @@ arch=('x86_64')
 license=('custom')
 depends=('glibc')
 replaces=('byacc-noconflict')
-source=(ftp://ftp.invisible-island.net/${pkgname}/${pkgname}-${pkgver}.tgz{,.asc})
+source=(https://invisible-mirror.net/archives/${pkgname}/${pkgname}-${pkgver}.tgz{,.asc})
 sha512sums=('247cf5469da618733a9ce8d2f079e56ef485354c4fce462014ac9d3108ebf7eccb0147a3e005374a541895eff28b9a63f5f840a7576a26cb23ab34d968a2d05c'
             'SKIP')
 validpgpkeys=('C52048C0C0748FEE227D47A2702353E0F7E48EDB') # Thomas Dickey <dickey@invisible-island.net>