diff --git a/src/main/java/com/ffii/lioner/modules/lioner/pdf/web/PdfController.java b/src/main/java/com/ffii/lioner/modules/lioner/pdf/web/PdfController.java
index ec5d745..a45dc97 100644
--- a/src/main/java/com/ffii/lioner/modules/lioner/pdf/web/PdfController.java
+++ b/src/main/java/com/ffii/lioner/modules/lioner/pdf/web/PdfController.java
@@ -160,6 +160,8 @@ public class PdfController {
         String templateName = (String) d.get("templateName");
         String lastname = StringUtils.trimToEmpty((String) d.get("lastname"));
         String firstname = StringUtils.trimToEmpty((String) d.get("firstname"));
+        lastname = lastname.replaceAll("[^a-zA-Z0-9]", "");
+        firstname = firstname.replaceAll("[^a-zA-Z0-9]", "");
         lastname = lastname.replaceAll("\\s+", "");
         firstname = firstname.replaceAll("\\s+", "");
         String filename = lastname + firstname + "-" + templateName + ".pdf";