diff --git a/src/controllers/PdfController.ts b/src/controllers/PdfController.ts
index 9a0bb52..affc7a4 100644
--- a/src/controllers/PdfController.ts
+++ b/src/controllers/PdfController.ts
@@ -14,7 +14,7 @@ export class PdfController {
     private initialized: boolean = false;
 
     @Post('/contracts')
-    @OpenAPI({ description: "Generate Sponsoring contract pdfs from runner objects.<br>You can choose your prefered locale by passing the 'locale' query-param." })
+    @OpenAPI({ description: "Generate Sponsoring contract pdfs from runner objects.<br>You can choose your prefered locale by passing the 'locale' query-param.<br> If you provide more than 100 runenrs this could take a moment or two (we tested up to 1000 runners in about 70sec so far)." })
     async generateContracts(@Body({ validate: true, options: { limit: "500mb" } }) runners: Runner | Runner[], @Res() res: any, @QueryParam("locale") locale: string) {
         if (!this.initialized) {
             await this.pdf.init();