diff --git a/docs/package.json b/docs/package.json
index 19bbd59aca..f2dfdb5117 100644
--- a/docs/package.json
+++ b/docs/package.json
@@ -5,7 +5,7 @@
     "@antora/collector-extension": "1.0.3",
     "@asciidoctor/tabs": "1.0.0-beta.6",
     "@springio/antora-extensions": "1.14.9",
-    "@springio/asciidoctor-extensions": "1.0.0-alpha.17",
+    "@springio/asciidoctor-extensions": "1.0.0-alpha.18",
     "asciidoctor-kroki": "0.18.1"
   }
 }