diff --git a/app/Http/Controllers/TasksController.php b/app/Http/Controllers/TasksController.php
index abb76bf..b456470 100644
--- a/app/Http/Controllers/TasksController.php
+++ b/app/Http/Controllers/TasksController.php
@@ -242,7 +242,7 @@ class TasksController extends Controller
 
             $user = User::find($id);
 
-            if ($user) {
+            if ($user && Carbon::now()->lessThanOrEqualTo($task->end)) {
                 $task->users()->detach($id);
 
                 broadcast(new VolunteerUnassignedFromTask(