diff --git a/pdf/update_pdf.sh b/pdf/update_pdf.sh
index fe55750..6a29ee9 100644
--- a/pdf/update_pdf.sh
+++ b/pdf/update_pdf.sh
@@ -1,8 +1,9 @@
 #! /bin/bash
-
+cd ..
 git checkout gh-pages
 git checkout master Kalman_and_Bayesian_Filters_in_Python.pdf
 git add Kalman_and_Bayesian_Filters_in_Python.pdf
 git commit -m 'updating PDF'
 git push
-git checkout master
\ No newline at end of file
+git checkout master
+cd pdf
\ No newline at end of file