# Add Custom code/ CSS correctly

<Hint type="success">

You won't lose any changes made in Minimog theme by adding Custom Code/CSS directly into these files, since it would be automatic-migrated to the updated theme (when you [update the theme using FoxHome](https://docs.foxecom.com/minimog-theme/getting-started/update-minimog-theme#how-to-update-minimog-theme-automatically)):

</Hint>

* File **assets/custom.css.liquid:** Add **Custom CSS** here.
* File **snippets/custom-code-head.liquid:**  Add **Custom Code** *such as* *tracking script, meta tag* before closing tag \</head>.
* File **snippets/custom-code-body.liquid:** Add **Custom Code** *such as tracking script* before closing tag \</body>.

If you made any customizations in these files:&#x20;

* Any files created by a 3rd-party app or customized codes from merchants/dev teams;
* **theme.liquid snippets;**

then you would need to manually copy the **Custom code/CSS** over to the updated theme. There is currently no way around this with Shopify.