diff --git a/config-sample.yaml b/config-sample.yaml
index e845ddb97..4e436705a 100644
--- a/config-sample.yaml
+++ b/config-sample.yaml
@@ -6,6 +6,8 @@ port: 7880
 # clients could connect to any node and be routed to the same room
 redis:
   address: redis.host:6379
+  # To require TLS transport
+  # use_tls: true
   # db: 0
   # username: myuser
   # password: mypassword