diff --git a/CHANGELOG.md b/CHANGELOG.md
index f1ed3279..7f25c7b3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## 2026-08-28
+### Added
+- Updated default [`version`](https://github.com/overleaf/toolkit/blob/master/lib/config-seed/version) to `6.3.0`.
+- Set TexLive 2026 as default image for Sandboxed Compiles.
+- Added `OVERLEAF_HEADER_IMAGE_URL_LIGHT` and `OVERLEAF_HEADER_IMAGE_URL_LIGHT` to [`config-seed/variables.env`](https://github.com/overleaf/toolkit/blob/master/lib/config-seed/variables.env).
+
 ## 2026-07-20
 ### Added
 - Updated default [`version`](https://github.com/overleaf/toolkit/blob/master/lib/config-seed/version) to `6.2.2`.
diff --git a/lib/config-seed/variables.env b/lib/config-seed/variables.env
index 9bfb62a7..fa16e85e 100644
--- a/lib/config-seed/variables.env
+++ b/lib/config-seed/variables.env
@@ -22,6 +22,8 @@ OVERLEAF_INVITE_TOKEN_SECRET=
 # OVERLEAF_SITE_URL=http://overleaf.example.com
 # OVERLEAF_NAV_TITLE=Our Overleaf Instance
 # OVERLEAF_HEADER_IMAGE_URL=http://somewhere.com/mylogo.png
+# OVERLEAF_HEADER_IMAGE_URL_LIGHT=http://somewhere.com/my-light-logo.png
+# OVERLEAF_HEADER_IMAGE_URL_DARK=http://somewhere.com/my-dark-logo.png
 # OVERLEAF_ADMIN_EMAIL=support@example.com
 
 # OVERLEAF_LEFT_FOOTER='[{"text": "Contact your support team", "url": "mailto:support@example.com"}]'
@@ -61,8 +63,8 @@ EXTERNAL_AUTH=none
 # OVERLEAF_TEMPLATES_USER_ID=578773160210479700917ee5
 # OVERLEAF_NEW_PROJECT_TEMPLATE_LINKS=[{"name":"All Templates","url":"/templates/all"}]
 
-# TEX_LIVE_DOCKER_IMAGE=quay.io/sharelatex/texlive-full:2025.1
-# ALL_TEX_LIVE_DOCKER_IMAGES=quay.io/sharelatex/texlive-full:2025.1,quay.io/sharelatex/texlive-full:2024.1,quay.io/sharelatex/texlive-full:2023.1
+# TEX_LIVE_DOCKER_IMAGE=quay.io/sharelatex/texlive-full:2026.1
+# ALL_TEX_LIVE_DOCKER_IMAGES=quay.io/sharelatex/texlive-full:2026.1,quay.io/sharelatex/texlive-full:2025.1,quay.io/sharelatex/texlive-full:2024.1
 
 # OVERLEAF_PROXY_LEARN=true
 
diff --git a/lib/config-seed/version b/lib/config-seed/version
index ca063943..798e3899 100644
--- a/lib/config-seed/version
+++ b/lib/config-seed/version
@@ -1 +1 @@
-6.2.2
+6.3.0