diff --git a/migrations/2025_04_24_103227_add_renderer_to_custom_fields_table.php b/migrations/2025_04_24_103227_add_renderer_to_custom_fields_table.php
new file mode 100644
index 0000000..68455d5
--- /dev/null
+++ b/migrations/2025_04_24_103227_add_renderer_to_custom_fields_table.php
@@ -0,0 +1,32 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class AddRendererToCustomFieldsTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('custom_fields', function (Blueprint $table) {
+            $table->text('renderer')->nullable();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('custom_fields', function (Blueprint $table) {
+            $table->dropColumn('renderer');
+        });
+    }
+}
diff --git a/src/App/Http/Controllers/PlainCustomFieldController.php b/src/App/Http/Controllers/PlainCustomFieldController.php
index ff00a2d..3b00868 100644
--- a/src/App/Http/Controllers/PlainCustomFieldController.php
+++ b/src/App/Http/Controllers/PlainCustomFieldController.php
@@ -33,7 +33,7 @@ public function __construct(CustomField $customField)
      * @param  string|null  $type
      * @return JsonResponse
      */
-    public function index(string $type = null): JsonResponse
+    public function index(?string $type = null): JsonResponse
     {
         return response()->json($this->customField::plain($type)->get());
     }
diff --git a/src/App/Http/Requests/CustomFieldCreateRequest.php b/src/App/Http/Requests/CustomFieldCreateRequest.php
index 9305546..46fa297 100644
--- a/src/App/Http/Requests/CustomFieldCreateRequest.php
+++ b/src/App/Http/Requests/CustomFieldCreateRequest.php
@@ -47,6 +47,7 @@ public function rules()
             'validation_id' => 'nullable|exists:custom_field_validations,id',
             'group' => 'nullable|string',
             'order' => 'nullable|integer',
+            'renderer' => 'nullable|string',
         ];
     }
 
diff --git a/src/App/Http/Requests/CustomFieldUpdateRequest.php b/src/App/Http/Requests/CustomFieldUpdateRequest.php
index a86f329..8ea3fed 100644
--- a/src/App/Http/Requests/CustomFieldUpdateRequest.php
+++ b/src/App/Http/Requests/CustomFieldUpdateRequest.php
@@ -50,6 +50,7 @@ public function rules()
             'validation_id' => 'nullable|exists:custom_field_validations,id',
             'group' => 'nullable|string',
             'order' => 'nullable|integer',
+            'renderer' => 'nullable|string',
         ];
 
         return Arr::except($rules, self::LOCKED_FOR_EDITING);
diff --git a/src/App/Http/Requests/PlainCustomFieldRequest.php b/src/App/Http/Requests/PlainCustomFieldRequest.php
index a8e3b22..b8bdfb4 100644
--- a/src/App/Http/Requests/PlainCustomFieldRequest.php
+++ b/src/App/Http/Requests/PlainCustomFieldRequest.php
@@ -44,6 +44,7 @@ public function rules()
             'validation_id' => 'nullable|exists:custom_field_validations',
             'group' => 'nullable|string',
             'order' => 'nullable|integer',
+            'renderer' => 'nullable|string',
         ];
     }
 
diff --git a/src/App/Http/Requests/RemoteCustomFieldRequest.php b/src/App/Http/Requests/RemoteCustomFieldRequest.php
index aa090f4..a5986b2 100644
--- a/src/App/Http/Requests/RemoteCustomFieldRequest.php
+++ b/src/App/Http/Requests/RemoteCustomFieldRequest.php
@@ -44,6 +44,7 @@ public function rules()
             'validation_id' => 'nullable|exists:custom_field_validations',
             'group' => 'nullable|string',
             'order' => 'nullable|integer',
+            'renderer' => 'nullable|string',
             'remote' => 'required|array',
             'remote.url' => 'required|url',
             'remote.method' => 'required|in:GET,POST,PUT',
diff --git a/src/App/Http/Requests/SelectionCustomFieldRequest.php b/src/App/Http/Requests/SelectionCustomFieldRequest.php
index 95c90ff..c0a2491 100644
--- a/src/App/Http/Requests/SelectionCustomFieldRequest.php
+++ b/src/App/Http/Requests/SelectionCustomFieldRequest.php
@@ -44,6 +44,7 @@ public function rules()
             'validation_id' => 'nullable|exists:custom_field_validations',
             'group' => 'nullable|string',
             'order' => 'nullable|integer',
+            'renderer' => 'nullable|string',
             'selection' => 'array',
             'selection.multiselect' => 'boolean',
             'values' => 'array',
diff --git a/src/App/Models/CustomField.php b/src/App/Models/CustomField.php
index ff5eb59..7137389 100644
--- a/src/App/Models/CustomField.php
+++ b/src/App/Models/CustomField.php
@@ -80,7 +80,7 @@ public function selectable(): MorphTo
         return $this->morphTo();
     }
 
-    public function scopePlain(Builder $query, string $subType = null): Builder
+    public function scopePlain(Builder $query, ?string $subType = null): Builder
     {
         /** @var PlainType $plainType */
         $plainType = app(PlainType::class);