diff --git a/README.md b/README.md
index 73a123cf..c774bfd8 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,18 @@
 
 Yet Another ORM library for Go, aims for developer friendly
 
+## Overview
+
+* CURD
+* Chainable API
+* Before/After Create/Save/Update/Delete Callbacks
+* Order/Select/Limit/Offset Support
+* Automatically CreatedAt, UpdatedAt
+* Create table from struct
+* Prevent SQL Injection
+* Goroutines friendly
+* Database Pool
+
 ## Basic Usage
 
 ```go
@@ -16,8 +28,11 @@ type User struct {
 	UpdatedAt time.Time
 }
 
+// Set database pool
+db.SetPool(10)
+
 // Create
-user = User{Name: "jinzhu", Age: 18, Birthday: time.Now())
+user = User{Name: "jinzhu", Age: 18, Birthday: time.Now()}
 db.Save(&user)
 
 // Update
diff --git a/main.go b/main.go
index 0e5f6a32..0f8d658b 100644
--- a/main.go
+++ b/main.go
@@ -17,6 +17,10 @@ func Open(driver, source string) (db DB, err error) {
 	return
 }
 
+func (s *DB) SetPool(n int) {
+	s.Db.SetMaxIdleConns(n)
+}
+
 func (s *DB) buildORM() *Chain {
 	return &Chain{db: s.Db, driver: s.Driver}
 }
diff --git a/orm_test.go b/orm_test.go
index 68365798..9399edba 100644
--- a/orm_test.go
+++ b/orm_test.go
@@ -40,6 +40,8 @@ var (
 
 func init() {
 	db, _ = Open("postgres", "user=gorm dbname=gorm sslmode=disable")
+	db.SetPool(10)
+
 	db.Exec("drop table users;")
 	db.Exec("drop table products;")