README.md in bigquery_migration-0.3.0 vs README.md in bigquery_migration-0.3.1

@@ -1,9 +1,13 @@
 # BigqueryMigration
 
 BigqueryMigraiton is a tool or a ruby library to migrate (or alter) BigQuery table schema.
 
+## Requirements
+
+* Ruby >= 2.3.0
+
 ## Installation
 
 Add this line to your application's Gemfile:
 
 ```ruby
@@ -29,10 +33,12 @@
 ```yaml
 bigquery: &bigquery
   json_keyfile: your-project-000.json
   dataset: your_dataset_name
   table: your_table_name
+  # If your data is in a location other than the US or EU multi-region, you must specify the location
+  # location: asia-northeast1
 
 actions:
 - action: create_dataset
   <<: *bigquery
 - action: migrate_table
@@ -57,12 +63,15 @@
 
 ```ruby
 require 'bigquery_migration'
 
 config = {
-  json_keyfile: '/path/to/your-project-000.json'
-  dataset: 'your_dataset_name'
-  table: 'your_table_name'
+  json_keyfile: '/path/to/your-project-000.json',
+  dataset: 'your_dataset_name',
+  table: 'your_table_name',
+
+  # If your data is in a location other than the US or EU multi-region, you must specify the location
+  # location: asia-northeast1,
 }
 columns = [
   { name: 'string', type: 'STRING' },
   { name: 'record', type: 'RECORD', fields: [
     { name: 'integer', type: 'INTEGER' },