diff --git a/app/Http/Controllers/GapoktanController.php b/app/Http/Controllers/GapoktanController.php
index 703d1ff..5bbd996 100644
--- a/app/Http/Controllers/GapoktanController.php
+++ b/app/Http/Controllers/GapoktanController.php
@@ -16,10 +16,11 @@ public function index()
     public function store(Request $request)
     {
         $request->validate([
-            'nik' => 'required|unique:gapoktans,nik|max:16',
+            'nik' => 'required|unique:gapoktans,nik|digits:16', 
             'nama' => 'required|string|max:255',
         ], [
             'nik.unique' => 'NIK ini sudah terdaftar di sistem.',
+            'nik.digits' => 'NIK wajib berisi tepat 16 digit angka.',
         ]);
 
         Gapoktan::create([
diff --git a/resources/views/admin/gapoktan/index.blade.php b/resources/views/admin/gapoktan/index.blade.php
index a2cf2c4..71b190e 100644
--- a/resources/views/admin/gapoktan/index.blade.php
+++ b/resources/views/admin/gapoktan/index.blade.php
@@ -21,8 +21,10 @@
                             @csrf
                             <div class="form-group mb-3">
                                 <label>NIK</label>
-                                <input type="number" name="nik" class="form-control" required
-                                    placeholder="Masukkan 16 digit NIK">
+                                <input type="text" name="nik" class="form-control" required
+                                    placeholder="Masukkan 16 digit NIK" 
+                                    minlength="16" maxlength="16" 
+                                    oninput="this.value = this.value.replace(/[^0-9]/g, '')">
                             </div>
                             <div class="form-group mb-3">
                                 <label>Nama Petani / Kelompok</label>