diff --git a/trunk/PKGBUILD b/trunk/PKGBUILD
index b1e68c7..08c4bd8 100644
--- a/trunk/PKGBUILD
+++ b/trunk/PKGBUILD
@@ -10,7 +10,8 @@ url='https://unbound.net/'
 license=('custom:BSD')
 arch=('x86_64')
 makedepends=('expat')
-optdepends=('expat: unbound-anchor')
+optdepends=('expat: unbound-anchor'
+            'hiredis: redis cachdb support')
 depends=('fstrm' 'openssl' 'libsodium' 'protobuf-c' 'libevent' 'ldns' 'dnssec-anchors')
 backup=('etc/unbound/unbound.conf')
 validpgpkeys=('EDFAA3F2CA4E6EB05681AF8E9F6F1C2D7E045F8D'
@@ -46,6 +47,8 @@ build() {
 		--enable-systemd \
 		--enable-tfo-client \
 		--enable-tfo-server \
+		--enable-cachedb \
+		--with-libhiredis \
 		--with-conf-file=/etc/unbound/unbound.conf \
 		--with-pidfile=/run/unbound.pid \
 		--with-rootkey-file=/etc/trusted-key.key \