diff --git a/update_doc.sh b/update_doc.sh
new file mode 100755
index 0000000..625bcd0
--- /dev/null
+++ b/update_doc.sh
@@ -0,0 +1,10 @@
+set -e
+
+cargo doc
+FROM=$(git rev-parse --short HEAD)
+git checkout gh-pages
+rsync -a target/doc/ .
+git add .
+git commit -m "Update doc for ${FROM}"
+# git push
+git checkout master