diff --git a/stacks/technitium_syn01.compose.yml b/stacks/technitium_syn01.compose.yml
index 2c3de07..8436b28 100644
--- a/stacks/technitium_syn01.compose.yml
+++ b/stacks/technitium_syn01.compose.yml
@@ -29,6 +29,9 @@ services:
       - DNS_SERVER_WEB_SERVICE_ENABLE_HTTPS=true
       - DNS_SERVER_WEB_SERVICE_HTTPS_PORT=53443
       - DNS_SERVER_WEB_SERVICE_USE_SELF_SIGNED_CERT=true
+      - DNS_SERVER_FORWARDERS=https://dns10.quad9.net/dns-query
+      - DNS_SERVER_FORWARDER_PROTOCOL=Https
+      - DNS_SERVER_ENABLE_BLOCKING=true
       - TZ=America/Los_Angeles
     sysctls:
       - net.ipv4.ip_local_port_range=1024 65535
diff --git a/stacks/technitium_syn02.compose.yml b/stacks/technitium_syn02.compose.yml
index 236ca1d..e8e1072 100644
--- a/stacks/technitium_syn02.compose.yml
+++ b/stacks/technitium_syn02.compose.yml
@@ -29,6 +29,9 @@ services:
       - DNS_SERVER_WEB_SERVICE_ENABLE_HTTPS=true
       - DNS_SERVER_WEB_SERVICE_HTTPS_PORT=53443
       - DNS_SERVER_WEB_SERVICE_USE_SELF_SIGNED_CERT=true
+      - DNS_SERVER_FORWARDERS=https://dns10.quad9.net/dns-query
+      - DNS_SERVER_FORWARDER_PROTOCOL=Https
+      - DNS_SERVER_ENABLE_BLOCKING=true
       - TZ=America/Los_Angeles
     sysctls:
       - net.ipv4.ip_local_port_range=1024 65535