# Step 1: Update your Amazon ECS application
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 In this section, you update your Amazon ECS application with a new revision of its task definition. The updated revision adds a new key and tag pair. In [Step 3: Use the CodeDeploy console to deploy your application](tutorial-ecs-deployment-deploy.md), you deploy the updated version of your Amazon ECS application. 

**To update your task definition**

1. Open the console at [https://console.aws.amazon.com/ecs/v2](https://console.aws.amazon.com/ecs/v2).

1.  In the navigation pane, choose **Task Definitions**. 

1. Choose the task definition used by your Amazon ECS service.

1. Select the task definition revision, and then choose **Create new revision**, **Create new revision**.

1.  For this tutorial, make a small update to the task definition by adding a tag. At the bottom of the page, under **Tags**, create a new tag by entering a new key and value pair. 

1.  Choose **Create**. 

   Your task definition's revision number is incremented by one. 

1.  Choose the **JSON** tab. Make a note of the following because you need this information in the next step. 
   +  The value for `taskDefinitionArn`. Its format is `arn:aws:ecs:aws-region:account-id:task-definition/task-definition-family:task-definition-revision`. This is the ARN of your updated task definition. 
   +  In the `containerDefinitions` element, the value for `name`. This is the name of your container. 
   +  In the `portMappings` element, the value for `containerPort`. This is the port for your container.