diff --git a/resources/chaosknoten/pretalx/docker_compose/compose.yaml.j2 b/resources/chaosknoten/pretalx/docker_compose/compose.yaml.j2
index b210098..20dbd9c 100644
--- a/resources/chaosknoten/pretalx/docker_compose/compose.yaml.j2
+++ b/resources/chaosknoten/pretalx/docker_compose/compose.yaml.j2
@@ -53,6 +53,7 @@ services:
     restart: unless-stopped
     environment:
       PRETALX_DATA_DIR: /data
+      PRETALX_FILE_UPLOAD_LIMIT: 1000 # MB
       PRETALX_FILESYSTEM_MEDIA: /public/media
       PRETALX_FILESYSTEM_STATIC: /public/static
       PRETALX_SITE_URL: https://pretalx.hamburg.ccc.de