diff --git a/src/helpers/newsletterHelper.ts b/src/helpers/newsletterHelper.ts
index 267f282..8ab1b05 100644
--- a/src/helpers/newsletterHelper.ts
+++ b/src/helpers/newsletterHelper.ts
@@ -268,7 +268,7 @@ export abstract class NewsletterHelper {
       await PdfExport.renderFile({
         template: "newsletter",
         title: `Newsletter von ${CLUB_NAME}`,
-        filename: `${rec.lastname}_${rec.firstname}_${rec.id}`,
+        filename: `${rec.lastname}_${rec.firstname}_${rec.id}`.replace(" ", "-"),
         folder: `newsletter/${newsletter.id}_${newsletter.title.replace(" ", "")}`,
         data: data,
       })