diff --git a/static/schedule/schedule.pdf b/static/schedule/schedule.pdf
index 0fab16d..3d6bfd5 100644
Binary files a/static/schedule/schedule.pdf and b/static/schedule/schedule.pdf differ
diff --git a/tools/pdf.js b/tools/pdf.js
index 5f0cc3f..a071d7c 100644
--- a/tools/pdf.js
+++ b/tools/pdf.js
@@ -16,6 +16,8 @@ const serverConf = {
   }
 };
 const browserConf = {
+  headless: true,
+  args: ['--no-sandbox', '--disable-setuid-sandbox'],
   defaultViewport: {width: 1280, height: 1700},
   margin: {
     top: "0cm",