# Release: Amazon IoT Greengrass Core v2.0.4 software update on February 04, 2021
<a name="greengrass-release-2021-02-04"></a>

This release provides version 2.0.4 of the Greengrass nucleus component. It includes the new `greengrassDataPlanePort` parameter to configure HTTPS communication over port 443 and fixes bugs. The minimal IAM policy now requires the `iam:GetPolicy` and `sts:GetCallerIdentity` when the Amazon IoT Greengrass Core software installer is run with `--provision true`.

**Release date:** February 04, 2021



## Public component updates
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The following table lists Amazon-provided components that include new and updated features. 

**Important**  <a name="component-patch-update-note"></a>
<a name="component-patch-update"></a>When you deploy a component, Amazon IoT Greengrass installs the latest supported versions of all of that component's dependencies. Because of this, new patch versions of Amazon-provided public components might be automatically deployed to your core devices if you add new devices to a thing group, or you update the deployment that targets those devices. Some automatic updates, such as a nucleus update, can cause your devices to restart unexpectedly.   
<a name="component-version-pinning"></a>To prevent unintended updates for a component that is running on your device, we recommend that you directly include your preferred version of that component when you [create a deployment](create-deployments.md). For more information about update behavior for Amazon IoT Greengrass Core software, see [Update the Amazon IoT Greengrass Core software (OTA)](update-greengrass-core-v2.md).


| **Component** | **Details** | 
| --- | --- | 
| Greengrass nucleus | Version 2.0.4 of the [Greengrass nucleus](greengrass-nucleus-component.md) is available. <a name="changelog-nucleus-2.0.4"></a>[\[See the AWS documentation website for more details\]](http://docs.amazonaws.cn/en_us/greengrass/v2/developerguide/greengrass-release-2021-02-04.html)  |