diff --git a/pdf/update_pdf.bat b/pdf/update_pdf.bat
index e611937..034670f 100644
--- a/pdf/update_pdf.bat
+++ b/pdf/update_pdf.bat
@@ -1,4 +1,3 @@
-#! /bin/bash
 cd ..
 git checkout gh-pages
 git pull
@@ -9,4 +8,4 @@ git add README.md
 git commit -m 'updating PDF'
 git push
 git checkout master
-cd pdf
\ No newline at end of file
+cd pdf