diff --git a/antora-playbook.yml b/antora-playbook.yml
index 5d9de5e203..1f59ef1ab5 100644
--- a/antora-playbook.yml
+++ b/antora-playbook.yml
@@ -27,6 +27,7 @@ asciidoc:
     - '@asciidoctor/tabs'
     - '@springio/asciidoctor-extensions'
     - '@springio/asciidoctor-extensions/javadoc-extension'
+    - '@springio/asciidoctor-extensions/configuration-properties-extension'
 urls:
   latest_version_segment_strategy: redirect:to
   latest_version_segment: ''