diff --git a/bookstack/.env.sample b/bookstack/.env.sample
index 6347202..5f2cd22 100644
--- a/bookstack/.env.sample
+++ b/bookstack/.env.sample
@@ -2,4 +2,6 @@ DOMAIN=bookstack.deineDomain.de
 
 DB_USER=bookstack
 DB_PASS=changeMe
-DB_ROOT_PASSWORD=changeMe
\ No newline at end of file
+DB_ROOT_PASSWORD=changeMe
+
+EXPORT_PAGE_SIZE=a4
\ No newline at end of file