diff --git a/app/Contribution/Actions/GenerateAction.php b/app/Contribution/Actions/GenerateAction.php
index afa2820e..db4ac92f 100644
--- a/app/Contribution/Actions/GenerateAction.php
+++ b/app/Contribution/Actions/GenerateAction.php
@@ -3,10 +3,12 @@
 namespace App\Contribution\Actions;
 
 use App\Contribution\ContributionFactory;
+use App\Contribution\Documents\DvDocument;
 use App\Rules\JsonBase64Rule;
 use Illuminate\Support\Facades\Validator;
 use Lorisleiva\Actions\ActionRequest;
 use Lorisleiva\Actions\Concerns\AsAction;
+use Zoomyboy\Tex\BaseCompiler;
 use Zoomyboy\Tex\Compiler;
 use Zoomyboy\Tex\Tex;
 
@@ -18,7 +20,7 @@ class GenerateAction
      * @param class-string<DvDocument> $document
      * @param array<string, mixed>     $payload
      */
-    public function handle(string $document, array $payload): Compiler
+    public function handle(string $document, array $payload): BaseCompiler
     {
         return Tex::compile($document::fromRequest($payload));
     }
@@ -34,7 +36,7 @@ class GenerateAction
     }
 
     /**
-     * @return array<stirng, mixed>
+     * @return array<string, mixed>
      */
     public function rules(): array
     {
diff --git a/app/Contribution/Documents/DvDocument.php b/app/Contribution/Documents/DvDocument.php
index 412233c8..949f8292 100644
--- a/app/Contribution/Documents/DvDocument.php
+++ b/app/Contribution/Documents/DvDocument.php
@@ -25,6 +25,11 @@ class DvDocument extends ContributionDocument
     ) {
     }
 
+    /**
+     * @param array<string, mixed> $payload
+     */
+    abstract public static function fromRequest(array $payload): self;
+
     public function dateRange(): string
     {
         return Carbon::parse($this->dateFrom)->format('d.m.Y')