diff --git a/src/main/java/ru/ulstu/extractor/ts/service/TimeSeriesService.java b/src/main/java/ru/ulstu/extractor/ts/service/TimeSeriesService.java
index 6dba38c..f28a031 100644
--- a/src/main/java/ru/ulstu/extractor/ts/service/TimeSeriesService.java
+++ b/src/main/java/ru/ulstu/extractor/ts/service/TimeSeriesService.java
@@ -128,7 +128,8 @@ public class TimeSeriesService {
         if (ts != null && ts.getValues().size() > MIN_TIME_SERIES_LENGTH) {
             JSONObject response = httpService.post(TIME_SERIES_TENDENCY_URL, new JSONObject(new JsonTimeSeries(normalizeTimeSeries(ts))));
             LOG.debug("Успешно отправлен на сервис сглаживания");
-            if (response.has("response") && response.getString("response").equals("empty")) {
+            if (response.has("response") && response.getString("response").equals("empty")
+                    || !response.has("timeSeries")) {
                 return DEFAULT_TIME_SERIES_TENDENCY;
             }
             JSONArray jsonArray = response.getJSONObject("timeSeries").getJSONArray("values");