diff --git a/buildSrc/src/main/java/org/springframework/boot/build/antora/GenerateAntoraPlaybook.java b/buildSrc/src/main/java/org/springframework/boot/build/antora/GenerateAntoraPlaybook.java
index adbf9e55a26..6b6a408ee92 100644
--- a/buildSrc/src/main/java/org/springframework/boot/build/antora/GenerateAntoraPlaybook.java
+++ b/buildSrc/src/main/java/org/springframework/boot/build/antora/GenerateAntoraPlaybook.java
@@ -93,8 +93,7 @@ public abstract class GenerateAntoraPlaybook extends DefaultTask {
 		}
 	}
 
-	@Input
-	final Map<String, Object> getData() throws IOException {
+	private Map<String, Object> getData() throws IOException {
 		Map<String, Object> data = loadPlaybookTemplate();
 		addExtensions(data);
 		addSources(data);