diff --git a/README.md b/README.md
index 7b7bdd2..5c6b82c 100644
--- a/README.md
+++ b/README.md
@@ -45,7 +45,7 @@ A push notification micro server using [Gin](https://github.com/gin-gonic/gin) f
 * Support notification queue and multiple workers.
 * Support `/api/stat/app` show notification success and failure counts.
 * Support `/api/config` show your [YAML](https://en.wikipedia.org/wiki/YAML) config.
-* Support store app stat to memory, [Redis](http://redis.io/), [BoltDB](https://github.com/boltdb/bolt) or [BuntDB](https://github.com/tidwall/buntdb).
+* Support store app stat to memory, [Redis](http://redis.io/), [BoltDB](https://github.com/boltdb/bolt), [BuntDB](https://github.com/tidwall/buntdb) or [LevelDB](https://github.com/syndtr/goleveldb).
 * Support `p12` or `pem` formtat of iOS certificate file.
 * Support `/sys/stats` show response time, status code count, etc.
 * Support for HTTP proxy to Google server (GCM).
@@ -94,16 +94,18 @@ log:
   hide_token: true
 
 stat:
-  engine: "memory" # support memory, redis or boltdb
+  engine: "memory" # support memory, redis, boltdb, buntdb or leveldb
   redis:
     addr: "localhost:6379"
     password: ""
     db: 0
   boltdb:
-    path: "gorush.db"
+    path: "bolt.db"
     bucket: "gorush"
   buntdb:
-    path: "gorush.db"
+    path: "bunt.db"
+  leveldb:
+    path: "level.db"
 ```
 
 ## Basic Usage