diff --git a/README.md b/README.md
index ee56525..67add2a 100644
--- a/README.md
+++ b/README.md
@@ -57,6 +57,7 @@
   - [Advanced](#advanced)
 - [Contributing](#contributing)
 - [Upgrading](#upgrading)
+  - [To v9.0.0](#to-v900)
   - [To v8.0.0](#to-v800)
   - [To v7.0.0](#to-v700)
   - [To v6.0.0](#to-v600)
@@ -1200,6 +1201,10 @@ This section lists major and breaking changes of each Helm Chart version.
 Please read them carefully to upgrade successfully, especially the change of the **default database backend**!
 If you miss this, blindly upgrading may delete your Postgres instance and you may lose your data!
 
+### To v9.0.0
+
+Namespaces for all resources are now set to `common.names.namespace` by default.
+
 ### To v8.0.0
 
 You need Forgejo v8+ to use this Helm Chart version.