diff --git a/build.sbt b/build.sbt
index aee6ca73..4edfa205 100644
--- a/build.sbt
+++ b/build.sbt
@@ -1,6 +1,6 @@
 
 name := "slicebox"
-version := "1.6"
+version := "1.6.1"
 organization := "se.nimsa"
 scalaVersion := "2.12.7"
 scalacOptions := Seq("-encoding", "UTF-8", "-Xlint", "-deprecation", "-unchecked", "-feature", "-target:jvm-1.8")
diff --git a/src/main/scala/se/nimsa/sbx/storage/S3Storage.scala b/src/main/scala/se/nimsa/sbx/storage/S3Storage.scala
index 4efd376d..47a38d48 100644
--- a/src/main/scala/se/nimsa/sbx/storage/S3Storage.scala
+++ b/src/main/scala/se/nimsa/sbx/storage/S3Storage.scala
@@ -65,15 +65,16 @@ class S3Storage(val bucket: String, val s3Prefix: String, val region: String)(im
     s3.deleteObject(bucket, sourceImageName)
   }
 
-  override def deleteByName(names: Seq[String]): Unit =
-    if (names.lengthCompare(1) == 0)
+  override def deleteByName(names: Seq[String]): Unit = {
+    if (names.lengthCompare(1) == 0) {
       s3.deleteObject(bucket, s3Id(names.head))
-    else {
+    } else {
       // micro-batch this since S3 accepts up to 1000 deletes at a time
-      names.grouped(1000).map { subset =>
+      names.grouped(1000).foreach { subset =>
         s3.deleteObjects(new DeleteObjectsRequest(bucket).withKeys(subset.map(name => s3Id(name)): _*).withQuiet(true))
       }
     }
+  }
 
   override def fileSink(name: String)(implicit executionContext: ExecutionContext): Sink[ByteString, Future[Done]] =
     Sink