diff --git a/default_config.go b/default_config.go
index 6e78c989..690e557e 100644
--- a/default_config.go
+++ b/default_config.go
@@ -33,8 +33,8 @@ redis:
     DB: 0
 gorm:
   default:
-    database: mysql
-    dsn: root@tcp(127.0.0.1:3306)/app?charset=utf8mb4&parseTime=True&loc=Local
+    database: sqlite
+    dsn: ":memory:"
 `
 
 // ProvideConfig is the default ConfigProvider for package Core.
diff --git a/otgorm/example_test.go b/otgorm/example_test.go
index 4d566b03..dfa9dc03 100644
--- a/otgorm/example_test.go
+++ b/otgorm/example_test.go
@@ -20,6 +20,6 @@ func Example() {
 	})
 	fmt.Println(err)
 	// Output:
-	// mysql
+	// sqlite
 	// <nil>
 }