diff --git a/config.example.json b/config.example.json
index 153634a..bd60d93 100644
--- a/config.example.json
+++ b/config.example.json
@@ -13,6 +13,7 @@
     "redis": {
         "addr": "localhost:6379",
         "password": "",
-        "db": 0
+        "db": 0,
+        "prefix": "ship"
     }
 }