scala libraryDependencies += "com.fasterxml.jackson.module" %% "jackson-module-scala" % "2.12.4" libraryDependencies += "com.fasterxml.jackson.dataformat" % "jackson-dataformat-yaml" % "2.12.4" scala case class Config(database: DatabaseConfig) case class DatabaseConfig(url: String, username: String) scala import com.fasterxml.jackson.databind.ObjectMapper import com.fasterxml.jackson.module.scala.DefaultScalaModule import com.fasterxml.jackson.dataformat.yaml.YAMLFactory val mapper = new ObjectMapper(new YAMLFactory()) mapper.registerModule(DefaultScalaModule) scala val configFile = new File("config.yml") val config: Config = mapper.readValue(configFile, classOf[Config]) scala val configFile = new File("config.yml") mapper.writeValue(configFile, config)