diff --git a/docs/upgrade-project.md b/docs/upgrade-project.md
index 22b280b13..3dbe82eab 100644
--- a/docs/upgrade-project.md
+++ b/docs/upgrade-project.md
@@ -2,12 +2,76 @@
 
 ## Table of Contents
 
+- [from v4.N to v4.13](#from-v4n-to-v413)
 - [from v4.N to v4.12](#from-v4n-to-v412)
 - [from v4.N to v4.7](#from-v4n-to-v47)
 - [from v3 to v4](#from-v3-to-v4)
 - [from v3.N to v3.12](#from-v3n-to-v312)
 - [from v2 to v3](#from-v2-to-v3)
 
+## from v4.N to v4.13
+
+- [Upgrade Custom Branding Setting](#upgrade-custom-logo-setting)
+
+### Upgrade Custom Branding Setting
+
+Refactor the `BRANDING` array to a `PORTAL_BRANDING` dict:
+
+```diff
+- NSF_BRANDING = [
+-     ...
+- ]
+-
+- TACC_BRANDING = [
+-     ...
+- ]
+-
+- UTEXAS_BRANDING = [
+-     ...
+- ]
+-
+- CUSTOM_BRANDING = [
+-     "portal",
+-     "custom-project_cms/img/org_logos/custom-project-logo.png",
+-     "",
+-     "/",
+-     "_self",
+-     "Custom Project Logo",
+-     "anonymous",
+-     "True"
+- ]
+-
+- BRANDING = [ NSF_BRANDING, TACC_BRANDING, UTEXAS_BRANDING, CUSTOM_BRANDING ]
++ from taccsite_cms._settings.branding import *
++
++ CUSTOM_BRANDING = {
++     "is_remote": True,
++     "img_file_src": "https://cdn.jsdelivr.net/gh/TACC/Core-CMS-Custom@______/custom-project_assets/custom-project-logo.png",
++     "img_class": "", # additional class names
++     "link_href": "/",
++     "link_target": "_self",
++     "img_alt_text": "Portal Logo",
++     "img_crossorigin": "anonymous",
++ } # To hide logo, set `PORTAL_LOGO = False`
++
++ PORTAL_BRANDING = [ PORTAL_BRANDING_TACC, PORTAL_BRANDING_UTEXAS ]
+```
+
+<details><summary>Map of Array Values to Dict Properties</summary>
+
+| | from Array Value | to Dict Property |
+| - | - | - |
+| 0 | "portal"                  | (unused value) |
+| 1 | "site_cms/.../portal.png" | `"img_file_src"` |
+| 2 | ""                        | `"img_class"` |
+| 3 | "/"                       | `"link_href"` |
+| 4 | "_self"                   | `"link_target"` |
+| 5 | "Portal Logo"             | `"img_alt_text"` |
+| 6 | "anonymous"               | `"img_crossorigin"` |
+| 7 | "True"                    | (whether to show logo) |
+
+</details>
+
 ## from v4.N to v4.12
 
 - [Rename Certain Settings](#rename-certain-settings)