diff --git a/HMCL/src/main/java/org/jackhuang/hmcl/ui/versions/ModUpdatesPage.java b/HMCL/src/main/java/org/jackhuang/hmcl/ui/versions/ModUpdatesPage.java
index f2a9e858e..092afed4b 100644
--- a/HMCL/src/main/java/org/jackhuang/hmcl/ui/versions/ModUpdatesPage.java
+++ b/HMCL/src/main/java/org/jackhuang/hmcl/ui/versions/ModUpdatesPage.java
@@ -277,9 +277,7 @@ public class ModUpdatesPage extends BorderPane implements DecoratorPage {
             dependents = mods.stream()
                     .map(mod -> {
                         return Task
-                                .runAsync(Schedulers.javafx(), () -> {
-                                    mod.getKey().setOld(true);
-                                })
+                                .runAsync(Schedulers.javafx(), () -> mod.getKey().setOld(true))
                                 .thenComposeAsync(() -> {
                                     FileDownloadTask task = new FileDownloadTask(
                                             new URL(mod.getValue().getFile().getUrl()),
@@ -326,6 +324,8 @@ public class ModUpdatesPage extends BorderPane implements DecoratorPage {
 
         @Override
         public void execute() throws Exception {
+            if (!isDependentsSucceeded())
+                throw getException();
         }
     }
 }
diff --git a/HMCLCore/src/main/java/org/jackhuang/hmcl/task/Task.java b/HMCLCore/src/main/java/org/jackhuang/hmcl/task/Task.java
index 774f77ef0..0e2f60a27 100644
--- a/HMCLCore/src/main/java/org/jackhuang/hmcl/task/Task.java
+++ b/HMCLCore/src/main/java/org/jackhuang/hmcl/task/Task.java
@@ -709,7 +709,7 @@ public abstract class Task<T> {
             @Override
             public void execute() throws Exception {
                 if (isDependentsSucceeded() != (Task.this.getException() == null))
-                    throw new AssertionError("When whenComplete succeeded, Task.exception must be null.");
+                    throw new AssertionError("When whenComplete succeeded, Task.exception must be null.", Task.this.getException());
 
                 action.execute(Task.this.getException());