<dependency>
<groupId>com.typesafe.akka</groupId>
<artifactId>akka-http-spray-json-experimental_2.11</artifactId>
<version>2.4.9</version>
</dependency>
libraryDependencies += "com.typesafe.akka" % "akka-http-spray-json-experimental_2.11" % "2.4.9"
@Grapes(
@Grab(group='com.typesafe.akka', module='akka-http-spray-json-experimental_2.11', version='2.4.9')
)
<dependency org="com.typesafe.akka" name="akka-http-spray-json-experimental_2.11" rev="2.4.9" />