diff --git a/pdf/update_pdf.sh b/pdf/update_pdf.sh
index 6a29ee9..488f275 100644
--- a/pdf/update_pdf.sh
+++ b/pdf/update_pdf.sh
@@ -2,7 +2,9 @@
 cd ..
 git checkout gh-pages
 git checkout master Kalman_and_Bayesian_Filters_in_Python.pdf
+git checkout README.md
 git add Kalman_and_Bayesian_Filters_in_Python.pdf
+git add README.md
 git commit -m 'updating PDF'
 git push
 git checkout master