diff --git a/.travis.yml b/.travis.yml
index b3deba4..919b36b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,6 +11,7 @@ go:
 
 services:
   - docker
+  - redis
 
 env:
   global:
diff --git a/README.md b/README.md
index eb27fba..9faf46f 100644
--- a/README.md
+++ b/README.md
@@ -57,6 +57,13 @@ log:
   access_level: "debug"
   error_log: "stderr" # stderr: output to console, or define log path like "log/error_log"
   error_level: "error"
+
+stat:
+  engine: "memory" # support memory or redis
+  redis:
+    addr: "localhost:6379"
+    password: ""
+    db: 0
 ```
 
 ## Basic Usage