in build.sbt [189:193]
def akka(scalaVersion: String) =
(scalaVersion match {
case s if s.startsWith("2.11.") => "com.typesafe.akka" %% "akka-actor" % "2.5.32"
case _ => "com.typesafe.akka" %% "akka-actor" % akkaVersion
}) % "provided"