How to Upgrade PrestaShop Safely: A Complete Step-by-Step Guide

Keeping your PrestaShop store updated is essential for maintaining security, improving performance, fixing bugs, and ensuring compatibility with modern technologies. However, upgrading an eCommerce website without proper preparation can cause unexpected errors, broken modules, theme issues, or even temporary store downtime.

In this guide, we will explain how to upgrade PrestaShop safely, prepare your store before upgrading, avoid common problems, and verify that everything works correctly after the upgrade.

Why Should You Upgrade PrestaShop?

Regular PrestaShop upgrades help your online store remain secure, stable, and compatible with modern technologies.

Here are some important benefits:

• Improved Security: Updates can fix security vulnerabilities and protect customer information.
• Bug Fixes: Resolve existing issues affecting store functionality.
• Better Performance: Benefit from improvements to speed and resource usage.
• Module Compatibility: Maintain compatibility with supported modules and integrations.
• New Features: Access improvements and new functionality introduced in newer versions.
• Long-Term Stability: Keep your store aligned with supported software versions.

Step 1: Check Your Current PrestaShop Version

Before starting the upgrade, identify which version of PrestaShop your store currently uses.

Follow these steps:

1. Log in to your PrestaShop admin panel.
2. Open the dashboard.
3. Locate the PrestaShop version information.
4. Check the official release notes for the target version.
5. Review the recommended upgrade path.

Do not assume that every older version can be upgraded directly to the latest release. Check the supported upgrade path and technical requirements first.

Step 2: Check Server Requirements

Your hosting environment must meet the requirements of the target PrestaShop version.

Check the following:

• PHP version and extensions.
• MySQL or MariaDB compatibility.
• Available disk space.
• Memory limit.
• Web server configuration.
• Composer and other dependencies, if required by your setup.

Contact your hosting provider if you are unsure whether your server supports the target version.

Step 3: Take a Complete Website Backup

<underline>Never upgrade PrestaShop without taking a complete backup.</underline>

A backup allows you to restore your store if something goes wrong during the upgrade.

You should back up two important components:

1. Website Files

Download a complete copy of your PrestaShop installation, including:

• Admin and application files.
• Themes and custom templates.
• Modules.
• Images and product uploads.
• Configuration files.

2. Database Backup

Export your complete PrestaShop database using phpMyAdmin, your hosting control panel, or a database backup tool.

Store the files and database backup in a secure location outside your live hosting environment.

Also, verify that the backup can actually be restored.

Step 4: Create a Staging Environment

A staging environment is a separate copy of your live store where you can test the upgrade without affecting customers.

Follow these steps:

1. Create a subdomain or staging directory.
2. Copy your website files.
3. Import your database backup.
4. Update the staging database configuration.
5. Disable outgoing emails and payment processing where appropriate.
6. Restrict public access to the staging website.
7. Perform the upgrade on staging first.

Test the entire upgrade process on staging before making changes to your live store.

Step 5: Check Theme and Module Compatibility

Third-party themes and modules may not support the new PrestaShop version.

Before upgrading:

• Check whether your theme supports the target version.
• Update compatible modules.
• Identify outdated or unsupported modules.
• Check custom code modifications.
• Contact module developers if compatibility information is unavailable.

Pay special attention to payment gateways, shipping modules, checkout customizations, and SEO modules because they directly affect store operations.

Step 6: Upgrade PrestaShop Using the Recommended Method

PrestaShop provides an official upgrade process through its supported upgrade tools.

For many store owners, the Update Assistant module is the recommended way to perform supported upgrades.

General upgrade procedure:

1. Review the official upgrade documentation.
2. Install or update the supported Update Assistant module.
3. Configure the upgrade settings.
4. Confirm that a complete backup is available.
5. Select the appropriate target version and upgrade channel.
6. Start the upgrade process.
7. Monitor the process and check for errors.
8. Wait until the upgrade finishes successfully.

Avoid manually replacing core files or running database upgrade scripts unless the official documentation specifically instructs you to do so.

Step 7: Clear Cache After Upgrading

Old cache files can sometimes cause display problems or unexpected behavior after an upgrade.

To clear the cache:

1. Log in to the PrestaShop back office.
2. Open Advanced Parameters.
3. Select Performance.
4. Clear the cache.
5. Refresh your browser.

If necessary, follow the official instructions for clearing application cache files on your server.

Step 8: Test Your Store After the Upgrade

After upgrading, carefully test your website before allowing normal customer activity to resume.

Use this checklist:

• Homepage loads correctly.
• Product pages display properly.
• Categories and product images work.
• Add-to-cart functionality works.
• Checkout process completes successfully.
• Payment gateway works in test mode.
• Shipping methods calculate correctly.
• Customer registration and login work.
• Order confirmation emails are delivered.
• Search and filters function properly.
• Mobile layout displays correctly.
• SEO URLs and redirects work.
• Admin dashboard operates normally.

Check server logs and PrestaShop error logs for any unexpected issues.

Step 9: Monitor Website Performance

After completing the upgrade, monitor your website for a few days.

Pay attention to:

• Website loading speed.
• PHP errors.
• Database errors.
• Failed orders.
• Payment issues.
• Module errors.
• Customer complaints.
• Google Search Console indexing problems.

If you notice any critical problems, investigate them immediately.

Common Problems During PrestaShop Upgrades

Here are some common upgrade issues and their possible solutions.

Never delete database tables or core files simply to remove an error. Identify the underlying cause first.

Best Practices for Safe PrestaShop Upgrades

Follow these recommendations whenever you upgrade your store:

1. Always create a complete file and database backup.
2. Test the upgrade on a staging website.
3. Read official release notes before upgrading.
4. Verify PHP and database compatibility.
5. Check theme and module compatibility.
6. Schedule upgrades during low-traffic periods.
7. Avoid making changes during the upgrade.
8. Keep a copy of your previous working version.
9. Test checkout and payment functionality.
10. Monitor website errors after upgrading.

Conclusion

Upgrading PrestaShop safely requires careful planning, proper backups, compatibility checks, and thorough testing. By following the steps in this guide, you can reduce downtime, protect customer information, and keep your online store running smoothly.

Always test upgrades on a staging environment before updating your live website. A well-planned upgrade helps maintain a secure, stable, and reliable eCommerce business.

Frequently Asked Questions (FAQs)

1. Is it safe to upgrade PrestaShop?

Yes. Upgrading is generally safe when you follow the recommended upgrade path, verify compatibility, and maintain complete backups.

2. Do I need to back up my website before upgrading?

Yes. Always back up both website files and the complete database before starting an upgrade.

3. Will upgrading PrestaShop affect my theme?

It can. Some themes may not support newer versions, so check compatibility and update your theme when necessary.

4. Can I upgrade PrestaShop without losing products and orders?

Yes. A properly performed upgrade should preserve your products, customers, and orders. However, always create and verify a backup first.

5. Should I upgrade PrestaShop on a live website?

It is better to upgrade on a staging website first. Once everything works correctly, schedule the live upgrade during a low-traffic period.

6. What should I do if the upgrade fails?

Check the upgrade logs and server error logs. If the problem cannot be resolved safely, restore your verified pre-upgrade files and database backup.

7. How often should I upgrade PrestaShop?

Review official releases regularly and apply relevant security and maintenance updates. Plan major version upgrades carefully after checking compatibility.