diff --git a/LICENSE b/LICENSE
index 09efb36..d85fe4e 100644
--- a/LICENSE
+++ b/LICENSE
@@ -226,6 +226,15 @@ Spray Caching 1.3.4 (io.spray:spray-caching_2.11:1.3.4)
   https://github.com/spray/spray/blob/master/LICENSE
   Copyright (C) 2011-2015 the spray project <http://spray.io>
 
+Akka 2.5.6 (com.typesafe.akka:akka-stream_2.11:2.5.6)
+  https://akka.io/
+  The file
+    build/openwhisk/common/scala/src/main/scala/org/apache/openwhisk/core/containerpool/logging/DockerToActivationFileLogStore.scala
+  contains OwSink.combine, which is derived from Akka's
+  akka.stream.scaladsl.Sink.combine. Licensed under the Apache License,
+  Version 2.0.
+  Copyright (C) 2014-2017 Lightbend Inc. <http://www.lightbend.com>
+
 Gradle wrapper v5.5
   The files build/openwhisk/gradlew and build/openwhisk/gradlew.bat are
   distributed under the Apache License, Version 2.0. For details see those