diff --git a/src/main/scala/parse/Aggregate.scala b/src/main/scala/parse/Aggregate.scala
index f83eb99..9b56a78 100644
--- a/src/main/scala/parse/Aggregate.scala
+++ b/src/main/scala/parse/Aggregate.scala
@@ -8,7 +8,7 @@ import parse.Parser.parseLine
 
 object Aggregate {
 
-  case class UserQuery(
+  final case class UserQuery(
     cities: List[String],
     field: String,
     key: AggregateKey
@@ -45,10 +45,10 @@ object Aggregate {
   }
 
   sealed trait AggregateValue
-  case class DoubleValue(value: Double) extends AggregateValue
-  case class ListOptionValue(list: List[Option[Double]]) extends AggregateValue
-  case class StringListList(list: List[List[String]]) extends AggregateValue
-  case class DistinctStringList(list: List[String]) extends AggregateValue
+  final case class DoubleValue(value: Double) extends AggregateValue
+  final case class ListOptionValue(list: List[Option[Double]]) extends AggregateValue
+  final case class StringListList(list: List[List[String]]) extends AggregateValue
+  final case class DistinctStringList(list: List[String]) extends AggregateValue
   object AggregateValue {
     def getKeys: List[String] = {
       val runtimeMirror = scala.reflect.runtime.currentMirror
diff --git a/src/main/scala/parse/WeatherData.scala b/src/main/scala/parse/WeatherData.scala
index 59e707c..ce90917 100644
--- a/src/main/scala/parse/WeatherData.scala
+++ b/src/main/scala/parse/WeatherData.scala
@@ -4,13 +4,13 @@ import java.time.LocalDateTime
 import scala.reflect.runtime.universe._
 
 
-case class WeatherStationData(
+final case class WeatherStationData(
                                city: String,
                                timestamp: LocalDateTime,
                                weather: WeatherData,
                              )
 
-case class WeatherData(
+final case class WeatherData(
                       tempMax: Option[Double],
                       tempMin: Option[Double],
                       tempAvg: Option[Double],