diff --git a/update_pdf.sh b/update_pdf.sh
new file mode 100644
index 0000000..fe55750
--- /dev/null
+++ b/update_pdf.sh
@@ -0,0 +1,8 @@
+#! /bin/bash
+
+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