diff --git a/mdoc-sbt/src/main/scala/mdoc/MdocPlugin.scala b/mdoc-sbt/src/main/scala/mdoc/MdocPlugin.scala
index 57b0163c..f9f08bd7 100644
--- a/mdoc-sbt/src/main/scala/mdoc/MdocPlugin.scala
+++ b/mdoc-sbt/src/main/scala/mdoc/MdocPlugin.scala
@@ -269,7 +269,7 @@ object MdocPlugin extends AutoPlugin {
       def proxyForSetting(): Def.Initialize[Option[AnyRef]] = {
         val cls = Class.forName(fullyQualifiedClassName)
         val stageManifest = new Manifest[AnyRef] { override def runtimeClass: Class[_] = cls }
-        (ref / SettingKey(attributeName)(stageManifest, anyWriter)).?
+        (ref / SettingKey(attributeName)(using stageManifest, anyWriter)).?
       }
       try {
         val stageSetting = proxyForSetting()