diff --git a/antora-playbook.yml b/antora-playbook.yml
index f32584b2..8485420b 100644
--- a/antora-playbook.yml
+++ b/antora-playbook.yml
@@ -26,6 +26,7 @@ asciidoc:
   extensions:
     - '@asciidoctor/tabs'
     - '@springio/asciidoctor-extensions'
+    - '@springio/asciidoctor-extensions/javadoc-extension'
 urls:
   latest_version_segment_strategy: redirect:to
   latest_version_segment: ''
diff --git a/package.json b/package.json
index ff4ab5e2..057a40fe 100644
--- a/package.json
+++ b/package.json
@@ -1,10 +1,10 @@
 {
-    "dependencies": {
-        "antora": "3.2.0-alpha.5",
-        "@antora/atlas-extension": "1.0.0-alpha.2",
-        "@antora/collector-extension": "1.0.0-alpha.7",
-        "@asciidoctor/tabs": "1.0.0-beta.6",
-        "@springio/antora-extensions": "1.12.0",
-        "@springio/asciidoctor-extensions": "1.0.0-alpha.11"
-    }
+  "dependencies": {
+    "antora": "3.2.0-alpha.6",
+    "@antora/atlas-extension": "1.0.0-alpha.2",
+    "@antora/collector-extension": "1.0.0-alpha.7",
+    "@asciidoctor/tabs": "1.0.0-beta.6",
+    "@springio/antora-extensions": "1.13.0",
+    "@springio/asciidoctor-extensions": "1.0.0-alpha.11"
+  }
 }