diff --git a/data/conf/unbound/unbound.conf b/data/conf/unbound/unbound.conf
index af725f0f..e2e3e9eb 100644
--- a/data/conf/unbound/unbound.conf
+++ b/data/conf/unbound/unbound.conf
@@ -24,6 +24,9 @@ server:
   #private-address: 169.254.0.0/16
   #private-address: fc00::/7
   #private-address: fe80::/10
+  # cache-min-ttl needs to be less or equal to cache-max-negative-ttl
+  cache-min-ttl: 5
+  cache-max-negative-ttl: 60
   root-hints: "/etc/unbound/root.hints"
   hide-identity: yes
   hide-version: yes