diff --git a/hieradata/node/apt.lizard.yaml b/hieradata/node/apt.lizard.yaml
index 3564e450720ae67b63f4731534c1a9de72e9dd68..09c6b6c042b26908d217edf63fc4b05503f0b2b2 100644
--- a/hieradata/node/apt.lizard.yaml
+++ b/hieradata/node/apt.lizard.yaml
@@ -37,6 +37,8 @@ tails::profile::reprepro::custom::email_recipient: rm@tails.net
 tails::profile::reprepro::custom::git_remote: git://puppet-git.lizard/tails.git
 tails::profile::reprepro::custom::onion_v3_hostname: umjqavufhoix3smyq6az2sx4istmuvsgmz4bq5u5x56rnayejoo6l2qd.onion
 tails::profile::reprepro::snapshots::time_based::email_recipient: rm@tails.net
+tails::profile::sysctl::values:
+  net.ipv6.conf.all.disable_ipv6: 1
 tails::profile::firewall::public_services:
   'SSH':
     proto: tcp