diff --git a/antora-playbook.yml b/antora-playbook.yml
index 51a1f2843f..cb16c25750 100644
--- a/antora-playbook.yml
+++ b/antora-playbook.yml
@@ -14,10 +14,10 @@ git:
 content:
   sources:
     - url: https://github.com/spring-io/spring-generated-docs
-      branches: 'spring-projects/spring-security/{main,5.{{6..9},{1..9}+({0..9})}.{x,+({0..9})}}'
+      branches: 'spring-projects/spring-security/{main,5.{{6..9},{1..9}+({0..9})}.{x,+({0..9}?(-RC{1..9}))}}'
     - url: https://github.com/spring-projects/spring-security
-      branches: '{main,5.{{6..9},{1..9}+({0..9})}.x}'
-      tags: '5.{{6..9},{1..9}+({0..9})}.+({0..9})'
+      branches: [main, '5.{{6..9},{1..9}+({0..9})}.x']
+      tags: '5.{{6..9},{1..9}+({0..9})}.+({0..9})?(-RC{1..9})'
       start_path: docs
 asciidoc:
   attributes: