Trusted Script Sources

On 1st March 2026, Microsoft will begin to enforce Content Security Policy in SharePoint Online.

This affects all customers who installed ListBurst Charts before September 15, 2025.

There are currently browser warnings within SharePoint Pages which indicate whether or not this will affect your pages containing ListBurst Charts, which appear as follows and reference the "gstatic.com" domain:

To resolve this issue, you must perform one of the following actions;

• Add the Trusted Script sources to your SharePoint Admin Center (recommended)

• Remove ListBurst Charts from your App Catalog and re-install as per the Installation (Manual) steps

• Delay the enforcement of Content Security Policy via Powershell: https://learn.microsoft.com/en-us/sharepoint/dev/spfx/content-securty-policy-trusted-script-sources

Updating Trusted Script Sources

Updating Trusted Script Sources is easy.

1. Navigate to the SharePoint Admin Center, at mycompany-admin.sharepoint.com

2. Select Advanced > Script sources

3. Click Add source and enter https://www.gstatic.com/charts/

4. Click Add

5. Click Add source and enter https://www.gstatic.com/charts/51/

6. Click Add

You may now wish to open a SharePoint Page containing a ListBurst Chart to validate that the warning no longer appears.