diff --git a/rootfs/app/entrypoint.sh b/rootfs/app/entrypoint.sh
index 078f0be..98d7377 100755
--- a/rootfs/app/entrypoint.sh
+++ b/rootfs/app/entrypoint.sh
@@ -34,7 +34,7 @@ fi
 # set port
 cat >> /etc/unbound/unbound.conf.d/port.conf << EOF
 server:
-    port: ${PORT}
+    interface: 0.0.0.0:${PORT}
 EOF
 
 if [ "${DNSPROXY}" = true ] ; then
diff --git a/rootfs/etc/unbound/unbound.conf b/rootfs/etc/unbound/unbound.conf
index 76bc348..b255c21 100644
--- a/rootfs/etc/unbound/unbound.conf
+++ b/rootfs/etc/unbound/unbound.conf
@@ -1,5 +1,6 @@
 server:
     interface: 0.0.0.0
+    port: 53
     do-ip4: yes
     do-ip6: no
     do-udp: yes