diff --git a/build.sbt b/build.sbt
index 8faf2721..6ec00f16 100644
--- a/build.sbt
+++ b/build.sbt
@@ -9,7 +9,7 @@ inThisBuild(
 
 /** Versions */
 lazy val V = new {
-  val scalaDID = "0.1.0-M8"
+  val scalaDID = "0.1.0-M9"
 //   val scalajsJavaSecureRandom = "1.0.0"
 
   // FIXME another bug in the test framework https://github.com/scalameta/munit/issues/554
diff --git a/mediator/src/main/scala/io/iohk/atala/mediator/protocols/PickupExecuter.scala b/mediator/src/main/scala/io/iohk/atala/mediator/protocols/PickupExecuter.scala
index e74d9fcd..e5cbe4f6 100644
--- a/mediator/src/main/scala/io/iohk/atala/mediator/protocols/PickupExecuter.scala
+++ b/mediator/src/main/scala/io/iohk/atala/mediator/protocols/PickupExecuter.scala
@@ -135,7 +135,7 @@ object PickupExecuter
           ZIO.succeed(
             Reply(
               MessagesReceived(
-                thid = m.id,
+                thid = Some(m.id),
                 from = m.to.asFROM,
                 to = m.from.asTO,
                 message_id_list = m.attachments.keys.toSeq,