diff --git a/antora/package-lock.json b/antora/package-lock.json
index 05db032741..d71db85432 100644
--- a/antora/package-lock.json
+++ b/antora/package-lock.json
@@ -11,7 +11,7 @@
         "@antora/site-generator": "3.2.0-alpha.4",
         "@asciidoctor/tabs": "1.0.0-beta.6",
         "@springio/antora-extensions": "1.11.1",
-        "@springio/antora-xref-extension": "1.0.0-alpha.3",
+        "@springio/antora-xref-extension": "1.0.0-alpha.4",
         "@springio/antora-zip-contents-collector-extension": "1.0.0-alpha.8",
         "@springio/asciidoctor-extensions": "1.0.0-alpha.11",
         "patch-package": "^8.0.0"
@@ -333,11 +333,11 @@
       }
     },
     "node_modules/@springio/antora-xref-extension": {
-      "version": "1.0.0-alpha.3",
-      "resolved": "https://registry.npmjs.org/@springio/antora-xref-extension/-/antora-xref-extension-1.0.0-alpha.3.tgz",
-      "integrity": "sha512-6NJqrHrnwnfkBcQHDABxVNaCP74MBp3iCayaxTeXL90BVo93Pqo4bQhzrISSrBXpb5rXqZWb3DPuFMCXSeWolg==",
+      "version": "1.0.0-alpha.4",
+      "resolved": "https://registry.npmjs.org/@springio/antora-xref-extension/-/antora-xref-extension-1.0.0-alpha.4.tgz",
+      "integrity": "sha512-ybIqQaNgK2pjAkOAd/A+IXK5AmxDZcKfpsp528UXIG2N3L4KFwvwljhANHktS0HHiN5QMZp0PuD0WZsClpenhQ==",
       "engines": {
-        "node": ">=16.0.0"
+        "node": ">=20.0.0"
       }
     },
     "node_modules/@springio/antora-zip-contents-collector-extension": {
diff --git a/antora/package.json b/antora/package.json
index 16a0e87f39..3660a94fa0 100644
--- a/antora/package.json
+++ b/antora/package.json
@@ -8,7 +8,7 @@
     "@antora/site-generator": "3.2.0-alpha.4",
     "@antora/atlas-extension": "1.0.0-alpha.2",
     "@springio/antora-extensions": "1.11.1",
-    "@springio/antora-xref-extension": "1.0.0-alpha.3",
+    "@springio/antora-xref-extension": "1.0.0-alpha.4",
     "@springio/antora-zip-contents-collector-extension": "1.0.0-alpha.8",
     "@asciidoctor/tabs": "1.0.0-beta.6",
     "@springio/asciidoctor-extensions": "1.0.0-alpha.11",