diff --git a/CHANGELOG.md b/CHANGELOG.md
index dc94ec1..7f39e83 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,8 @@ Note: you may refer to `README.md` for description of features.
 
 ## Dev (WIP)
 - Task IDs can be given to tasks (generated or not) (https://github.com/Vectorial1024/laravel-process-async/issues/5)
+- Updated to use `opis/closure` 4.0 for task details serialization (https://github.com/Vectorial1024/laravel-process-async/issues/12)
+  - Technically a breaking internal change, but no code change expected and downtime is expected to be almost negligible
 
 ## 0.2.0 (2025-01-04)
 - Task runners are now detached from the task giver (https://github.com/Vectorial1024/laravel-process-async/issues/7)
diff --git a/README.md b/README.md
index 60be4a9..8a5aa69 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ Utilize Laravel Processes to run PHP code asynchronously, as if using Laravel Co
 ## What really is this?
 [Laravel Processes](https://laravel.com/docs/10.x/processes) was first introduced in Laravel 10. This library wraps around `Process::start()` to let you execute code in the background to achieve async, albeit with some caveats:
 - You may only execute PHP code
-- Restrictions from `laravel/serializable-closure` apply (see [their README](https://github.com/laravel/serializable-closure))
+- Restrictions from `opis/closure` apply (see [their README](https://github.com/opis/closure))
 - Hands-off execution: no built-in result-checking, check the results yourself (e.g. via database, file cache, etc)
 
 This library internally uses an Artisan command to run the async code, which is similar to Laravel 11 [Concurrency](https://laravel.com/docs/11.x/concurrency).
diff --git a/composer.json b/composer.json
index 86a3853..36f891e 100644
--- a/composer.json
+++ b/composer.json
@@ -33,8 +33,8 @@
     "require": {
         "php": "^8.1",
         "illuminate/support": "^10.0|^11.0",
-        "laravel/serializable-closure": "^1.0",
-        "loophp/phposinfo": "^1.8"
+        "loophp/phposinfo": "^1.8",
+        "opis/closure": "^4.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^10",
@@ -50,5 +50,8 @@
                 "Vectorial1024\\LaravelProcessAsync\\ProcessAsyncServiceProvider"
             ]
         }
+    },
+    "config": {
+        "sort-packages": true
     }
 }
diff --git a/src/AsyncTask.php b/src/AsyncTask.php
index 37c30fd..4b24ee5 100644
--- a/src/AsyncTask.php
+++ b/src/AsyncTask.php
@@ -9,11 +9,12 @@
 use Illuminate\Support\Facades\Process;
 use Illuminate\Support\Str;
 use InvalidArgumentException;
-use Laravel\SerializableClosure\SerializableClosure;
 use LogicException;
 use loophp\phposinfo\OsInfo;
 use RuntimeException;
 
+use function Opis\Closure\{serialize, unserialize};
+
 /**
  * The common handler of an AsyncTask; this can be a closure (will be wrapped inside AsyncTask) or an interface instance.
  */
@@ -21,9 +22,9 @@ class AsyncTask
 {
     /**
      * The task to be executed in the background.
-     * @var SerializableClosure|AsyncTaskInterface
+     * @var Closure|AsyncTaskInterface
      */
-    private SerializableClosure|AsyncTaskInterface $theTask;
+    private Closure|AsyncTaskInterface $theTask;
 
     /**
      * The user-specified ID of the current task. (Null means user did not specify any ID).
@@ -105,10 +106,7 @@ class AsyncTask
      */
     public function __construct(Closure|AsyncTaskInterface $theTask, string|null $taskID = null)
     {
-        if ($theTask instanceof Closure) {
-            // convert to serializable closure first
-            $theTask = new SerializableClosure($theTask);
-        }
+        // opis/closure allows direct storage of closure
         $this->theTask = $theTask;
         if ($taskID === "") {
             throw new InvalidArgumentException("AsyncTask ID cannot be empty.");
@@ -116,6 +114,23 @@ public function __construct(Closure|AsyncTaskInterface $theTask, string|null $ta
         $this->taskID = $taskID;
     }
 
+    public function __serialize(): array
+    {
+        // serialize only the necessary info to reduce runner cmd length
+        return [
+            'theTask' => $this->theTask,
+            'timeLimit' => $this->timeLimit,
+        ];
+    }
+
+    public function __unserialize($data): void
+    {
+        [
+            'theTask' => $this->theTask,
+            'timeLimit' => $this->timeLimit,
+        ] = $data;
+    }
+
     /**
      * Inside an available PHP process, runs this AsyncTask instance.
      * 
@@ -159,10 +174,8 @@ public function run(): void
         }
 
         // then, execute the task itself
-        if ($this->theTask instanceof SerializableClosure) {
-            $innerClosure = $this->theTask->getClosure();
-            $innerClosure();
-            unset($innerClosure);
+        if ($this->theTask instanceof Closure) {
+            ($this->theTask)();
         } else {
             // must be AsyncTaskInterface
             $this->theTask->execute();