Update CHANGELOG.md (#1560)

CHANGELOG.md

@@ -5,8 +5,16 @@ The format of this Changelog is based on [Keep a Changelog](https://keepachangel
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased-`x.y.z`] - 2019-xx-xx
-- You can now launch cloud deployments in China by specifying the `CN` region in the Deployment Launcher. 
-- Setup.bat and Setup.sh both accept --china which is required for running spatial commands the CN region. 
+
+## [`0.6.3`] - 2019-12-05
+### Bug fixes: 
+- The C++ Worker SDK now communicates on port 443 instead of 444. This change is intended to protect your cloud deployments from DDoS attacks.
+
+### Internal:
+Features listed in the internal section are not ready to use but, in the spirit of open development, we detail every change we make to the GDK.
+- The GDK is now compatible with the `CN` launch region. When Improbable's online services are fully working in China, they will work with this version of the GDK. You will be able to create SpatialOS Deployments in China by specifying the `CN` region in the Deployment Launcher.
+- `Setup.bat` and `Setup.sh` both accept the `--china` flag, which will be required in order to run SpatialOS CLI commands in the `CN` region.
+- **SpatialOS GDK for Unreal** > **Editor Settings** now contains a **Region Settings** section. You will be required to set **Region where services are located** to `CN` in order to create SpatialOS Deployments in China.
 
 ## [`0.6.2`] - 2019-10-10