1. Right-click on Warp icon in `~/Applications folder
2. In the `Resources` directory, change Warp.icns to [your-custom-icon].icns
3. Delete `Contents/Plugins/WarpDockTilePlugin.docktileplugin` directory
```bash
touch /Applications/[name].app
killall Finder && killall Dock
```
[Programmatically changing icons on macOS](https://manik.cc/2020/05/21/macicons.html)
[Replace app icon automatically](https://metta.systems/blog/replace-app-icon-automatically/
)