diff --git a/core/src/main/java/ru/kirillius/pf/sdn/core/AppUpdateService.java b/core/src/main/java/ru/kirillius/pf/sdn/core/AppUpdateService.java
index 258596c..27910a6 100644
--- a/core/src/main/java/ru/kirillius/pf/sdn/core/AppUpdateService.java
+++ b/core/src/main/java/ru/kirillius/pf/sdn/core/AppUpdateService.java
@@ -162,7 +162,7 @@ public class AppUpdateService extends AppService {
                     .GET()
                     .build();
             var response = httpClient.send(request, HttpResponse.BodyHandlers.ofFile(tempFile));
-            if (response.statusCode() < 200 || response.statusCode() >= 300) {
+            if (response.statusCode() < 200 || response.statusCode() >= 400) {
                 SystemLogger.error("Unexpected response code when downloading update: " + response.statusCode(), CTX);
                 return;
             }
@@ -194,7 +194,7 @@ public class AppUpdateService extends AppService {
                     .GET()
                     .build();
             var response = httpClient.send(request, HttpResponse.BodyHandlers.ofString(StandardCharsets.UTF_8));
-            if (response.statusCode() < 200 || response.statusCode() >= 300) {
+            if (response.statusCode() < 200 || response.statusCode() >= 400) {
                 SystemLogger.error("Unexpected response code when checking updates: " + response.statusCode(), CTX);
                 return null;
             }