diff --git a/bag_replicator/src/main/scala/weco/storage_service/bag_replicator/Main.scala b/bag_replicator/src/main/scala/weco/storage_service/bag_replicator/Main.scala
index 7bc5f2cc4..00ed5cd81 100644
--- a/bag_replicator/src/main/scala/weco/storage_service/bag_replicator/Main.scala
+++ b/bag_replicator/src/main/scala/weco/storage_service/bag_replicator/Main.scala
@@ -4,7 +4,7 @@ import akka.actor.ActorSystem
 import com.azure.storage.blob.{BlobServiceClient, BlobServiceClientBuilder}
 import com.typesafe.config.Config
 
-import software.amazon.awssdk.services.s3.S3Client
+import software.amazon.awssdk.services.s3.{S3Client, S3AsyncClient}
 import software.amazon.awssdk.services.s3.presigner.S3Presigner
 import software.amazon.awssdk.services.sqs.SqsAsyncClient
 import software.amazon.awssdk.transfer.s3.S3TransferManager
@@ -46,8 +46,11 @@ object Main extends WellcomeTypesafeApp {
     implicit val s3Client: S3Client =
       S3Client.builder().build()
 
+    implicit val s3AsyncClient: S3AsyncClient =
+      S3AsyncClient.crtBuilder().build()
+
     implicit val s3TransferManager: S3TransferManager =
-      S3TransferManager.builder().build()
+      S3TransferManager.builder().s3Client(s3AsyncClient).build()
 
     implicit val s3Presigner: S3Presigner =
       S3Presigner.builder().build()