diff --git a/src/app/modules/home/form-quiz/form-create-quiz/form-create-quiz.component.ts b/src/app/modules/home/form-quiz/form-create-quiz/form-create-quiz.component.ts
index 294fc64b9140d18def0612a9adce72eb3150932f..bd71a324636519b5b4b1205ca3f2a6877d022f52 100644
--- a/src/app/modules/home/form-quiz/form-create-quiz/form-create-quiz.component.ts
+++ b/src/app/modules/home/form-quiz/form-create-quiz/form-create-quiz.component.ts
@@ -45,7 +45,7 @@ export class FormCreateQuizComponent implements OnInit {
                     const categories = this.form.value.category;
                     const difficulty = this.form.value.difficulty;
                     const NbQuestion = this.form.value.nbQuestion;
-                    this.questionService.createQuiz(NbQuestion, categories.id, difficulty).subscribe({
+                    this.questionService.createQuiz(NbQuestion, Number(categories), difficulty).subscribe({
                         next: (data: any) => {
                             this.router.navigate(['/play-quiz'], { queryParams: { idQuiz: data.id } });
                         },