diff --git a/build.gradle b/build.gradle
index fe27ac3ae2..0bd19073c2 100644
--- a/build.gradle
+++ b/build.gradle
@@ -15,7 +15,7 @@ antora {
 			'@antora/atlas-extension': '1.0.0-alpha.1',
 			'@antora/collector-extension': '1.0.0-alpha.3',
 			'@asciidoctor/tabs': '1.0.0-beta.3',
-			'@springio/antora-extensions': '1.4.2',
-			'@springio/asciidoctor-extensions': '1.0.0-alpha.8',
+			'@springio/antora-extensions': '1.6.0',
+			'@springio/asciidoctor-extensions': '1.0.0-alpha.9',
 	]
 }