Should I update WordPress themes?

New versions of WordPress are released regularly often accompanied by updates to the core default WordPress themes (the themes that come with WordPress such as Twenty Seventeen). Immediately following a new release, clients often ask me if it is safe to update the default WordPress themes. Here’s what you need to know.

Why Update the Core WordPress themes?

When there is a major new release of WordPress, new features are added.  The core themes are always updated to enable these new features to work.

Why Hesitate?

If you are using one of the core themes and you have made modifications to the theme files, updating will overwrite your changes and your website will revert to the standard theme appearance. Your modifications will be lost.

Child themes are the recommended way of making modifications to a theme.

What is a Child Theme?

A WordPress child theme is a theme that inherits the functionality of another theme, called the parent theme, and allows you to modify, or add to, the functionality of that parent theme.

When the parent theme is updated, your modifications are preserved.

What is your current theme?

Determine what theme is the currently active theme — Go to → Appearances → Themes

update twenty ten theme WordPress

Is it safe to update the theme?

  1. If the default themes are not active the updates won’t affect your website appearance — go ahead and update the themes
  2. If you are using a default theme and you have not modified the theme files in any way — go ahead and update the themes
  3. If you are using a child theme  your modifications are safe — go ahead and update the themes
  4. If you are using a default theme (Twenty Ten to Twenty Seventeen) as your active theme and you’ve modified the theme — don’t update the themes. You need to move your modifications to a child theme before updating

You can delete themes you aren’t using (except for the parent theme) so you don’t have to update them all.

If you found this post helpful, please let me know by adding a comment below.


17 thoughts on “Should I update WordPress themes?”

    1. Hi Sueli,

      Thanks for the question.

      It’s best practice to keep everything that is installed up-to-date. Updating will remove the update notifications – I don’t want clients to ignore these notices. I recommend that clients keep one WordPress default theme other than their active theme then, should their live theme break, WordPress has a fallback theme to use.

      ~ Ruth

  1. Thanks I googled: “Should I update all the WP themes each time?” Your post was first and it answered my question explicitly. Then your previous comment asked my next question, which you also answered perfectly. Thanks for taking the time to post these jewels of information that sometimes get missed even in our professional training.

  2. Ruth, I am not a programmer or a web guy by any means. I am to scared to create a child theme because i don’t know how to use the programs needed to create one… FTp, back ups and C++ are all things i don’t know how to use. is it ok to just skip updates if i am happy with the way my site is looking and working?

    1. Carlos,

      If your theme changes are just CSS changes… Go to Jetpack -> Settings and activate Custom CSS . This will allow you to make CSS edits without a child theme. Then you can safely update your theme. You don’t want to be in a position where you have to ignore any updates.

      I hope this helps.

  3. I’m using the most up-to-date version of the Twenty-Fourteen theme on my blog but I’m getting notifications to update the WordPress default theme. Do I really need to update it? If so, will it take over in place of my Twenty-Fourteen theme? Can I delete it without sending my self-hosted blog into a speed wobble?

  4. The latest version of my WordPress theme has a bug. The version before it does not have this bug. Is it okay for me to stay on the previous version? I don’t use many plugins, only HTML and custom CSS which written against my child theme. Is it possible for me to make this version of my WordPress theme future proof?


  5. Hello,
    Will updating the current theme also remove any changes you’ve made to the header and footer? And all theme-related files in general?

    1. Hello Alex,

      Any changes that have been made directly to theme files such as header and footer.php files need to be made in a child theme. If you update a theme you will lose any changes that were made directly to the theme. You need to move your modifications to a child theme before updating.

      1. Thanks for your reply.
        How would I move those modifications? I read some posts about using @import but wouldn’t that auto-update any parent theme changes to the child theme? Or am I just assuming. Also it seems like to @import function is only for style.css so how would I carry all changes from different files over?

  6. Hi Ruth,
    I am not using wordpress default theme ‘Twenty Nineteen’ on my website. But, I am still getting theme update notifications in my admin panel. Currently I am using another professional theme. I am not sure if updating the default theme can activate it as well. Can you please help clarify this?

    1. Hi Rashmi, I’m happy to clarify, update but don’t click activate. As long as you don’t click the activate button you’ll be fine.

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