diff --git a/platform/platform-impl/src/com/intellij/openapi/updateSettings/impl/PluginDownloader.java b/platform/platform-impl/src/com/intellij/openapi/updateSettings/impl/PluginDownloader.java
index 36a21b1f40da..2cb8d4e80374 100644
--- a/platform/platform-impl/src/com/intellij/openapi/updateSettings/impl/PluginDownloader.java
+++ b/platform/platform-impl/src/com/intellij/openapi/updateSettings/impl/PluginDownloader.java
@@ -34,7 +34,7 @@ import java.util.*;
 /**
  * @author anna
  */
-public class PluginDownloader {
+public final class PluginDownloader {
   private static final Logger LOG = Logger.getInstance(PluginDownloader.class);
 
   private static final String FILENAME = "filename=";
diff --git a/platform/platform-impl/src/com/intellij/openapi/updateSettings/impl/PluginUpdateInfoDialog.java b/platform/platform-impl/src/com/intellij/openapi/updateSettings/impl/PluginUpdateInfoDialog.java
index 284ebd19bf4a..1d8e6000f684 100644
--- a/platform/platform-impl/src/com/intellij/openapi/updateSettings/impl/PluginUpdateInfoDialog.java
+++ b/platform/platform-impl/src/com/intellij/openapi/updateSettings/impl/PluginUpdateInfoDialog.java
@@ -1,4 +1,4 @@
-// Copyright 2000-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
+// Copyright 2000-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 package com.intellij.openapi.updateSettings.impl;
 
 import com.intellij.ide.IdeBundle;
@@ -22,10 +22,10 @@ import java.util.Set;
  * @author pti
  */
 class PluginUpdateInfoDialog extends AbstractUpdateDialog {
-  private final Collection<? extends PluginDownloader> myUploadedPlugins;
+  private final Collection<PluginDownloader> myUploadedPlugins;
   private final boolean myPlatformUpdate;
 
-  PluginUpdateInfoDialog(Collection<? extends PluginDownloader> uploadedPlugins, boolean enableLink) {
+  PluginUpdateInfoDialog(Collection<PluginDownloader> uploadedPlugins, boolean enableLink) {
     super(enableLink);
     myUploadedPlugins = uploadedPlugins;
     myPlatformUpdate = false;
@@ -35,7 +35,7 @@ class PluginUpdateInfoDialog extends AbstractUpdateDialog {
   /**
    * Used from {@link UpdateInfoDialog} when both platform and plugin updates are available.
    */
-  PluginUpdateInfoDialog(@NotNull Collection<? extends PluginDownloader> updatePlugins) {
+  PluginUpdateInfoDialog(@NotNull Collection<PluginDownloader> updatePlugins) {
     super(false);
     myUploadedPlugins = updatePlugins;
     myPlatformUpdate = true;
diff --git a/platform/platform-impl/src/com/intellij/openapi/updateSettings/impl/UpdateInfoDialog.java b/platform/platform-impl/src/com/intellij/openapi/updateSettings/impl/UpdateInfoDialog.java
index 9604824d5eb3..fb58a8ee924f 100644
--- a/platform/platform-impl/src/com/intellij/openapi/updateSettings/impl/UpdateInfoDialog.java
+++ b/platform/platform-impl/src/com/intellij/openapi/updateSettings/impl/UpdateInfoDialog.java
@@ -50,9 +50,9 @@ import static com.intellij.openapi.util.Pair.pair;
 /**
  * @author pti
  */
-class UpdateInfoDialog extends AbstractUpdateDialog {
+final class UpdateInfoDialog extends AbstractUpdateDialog {
   private final UpdateChannel myUpdatedChannel;
-  private final Collection<? extends PluginDownloader> myUpdatedPlugins;
+  private final Collection<PluginDownloader> myUpdatedPlugins;
   private final BuildInfo myNewBuild;
   private final UpdateChain myPatches;
   private final boolean myWriteProtected;
@@ -65,7 +65,7 @@ class UpdateInfoDialog extends AbstractUpdateDialog {
                    @NotNull BuildInfo newBuild,
                    @Nullable UpdateChain patches,
                    boolean enableLink,
-                   @Nullable Collection<? extends PluginDownloader> updatedPlugins,
+                   @Nullable Collection<PluginDownloader> updatedPlugins,
                    @Nullable Collection<? extends IdeaPluginDescriptor> incompatiblePlugins) {
     super(enableLink);
     myUpdatedChannel = channel;