diff --git a/samples/knot.sample.conf.in b/samples/knot.sample.conf.in
index e07c8a70d4aea6a1842a7ee4e6b79710fcd0808e..2c9ab30142cd5d06303cf8cb32b26458e29fadee 100644
--- a/samples/knot.sample.conf.in
+++ b/samples/knot.sample.conf.in
@@ -4,10 +4,9 @@
 #
 
 server:
-    # Listen on all configured IPv4 interfaces.
-    listen: 0.0.0.0@53
-    # Listen on all configured IPv6 interfaces.
-    listen: ::@53
+    # Listen on IPv4 and IPv6 localhost
+    listen: 127.0.0.1@53
+    listen: ::1@53
     # User for running the server.
     # user: knot:knot