diff --git a/ipset-blacklist/PKGBUILD b/ipset-blacklist/PKGBUILD
index 508505e..2e9e118 100644
--- a/ipset-blacklist/PKGBUILD
+++ b/ipset-blacklist/PKGBUILD
@@ -5,6 +5,7 @@ arch=(any)
 url="https://github.com/trick77/ipset-blacklist"
 makedepends=('git')
 depends=('ipset' 'iptables' 'curl')
+optdepends=('iprange: CIDR optimization')
 source=(
     git+https://github.com/trick77/ipset-blacklist.git
     'ipset-blacklist.service'