diff --git a/src/main/java/ru/ulstu/controller/IndexController.java b/src/main/java/ru/ulstu/controller/IndexController.java
index 0bc59df..2a471dc 100644
--- a/src/main/java/ru/ulstu/controller/IndexController.java
+++ b/src/main/java/ru/ulstu/controller/IndexController.java
@@ -26,7 +26,6 @@ import java.io.IOException;
 import java.lang.reflect.InvocationTargetException;
 import java.time.format.DateTimeFormatter;
 import java.util.List;
-import java.util.Set;
 import java.util.concurrent.ExecutionException;
 import java.util.stream.Collectors;
 
@@ -74,9 +73,10 @@ public class IndexController {
         ModelingResult modelingResult = timeSeriesService.getForecast(timeSeries, countForecastPoints);
         TimeSeries forecast = modelingResult.getTimeSeries();
         TimeSeries testForecast = modelingResult.getTestForecast();
-        Set<String> dates = timeSeries.getValues().stream()
+        List<String> dates = timeSeries.getValues().stream()
                 .map(v -> v.getDate().format(DateTimeFormatter.ISO_DATE))
-                .collect(Collectors.toSet());
+                .distinct()
+                .collect(Collectors.toList());
         dates.addAll(forecast.getValues().stream()
                 .map(v -> v.getDate().format(DateTimeFormatter.ISO_DATE))
                 .collect(Collectors.toSet()));