diff --git a/.gitignore b/.gitignore
index 57510a2..4be3617 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 _site/
+_data/version.yml
diff --git a/_includes/head.html b/_includes/head.html
index c8f1016..b33744f 100644
--- a/_includes/head.html
+++ b/_includes/head.html
@@ -9,4 +9,8 @@
     <!-- Custom CSS -->
     <link rel="stylesheet" href="{{ "/css/main.css" | prepend: site.baseurl }}">
 
+    {% if site.data.version %}
+    <!-- site built from {{ site.data.version }} -->
+    {% endif %}
+
 </head>
diff --git a/scripts/pull-build-rsync b/scripts/pull-build-rsync
index 3694304..81244ac 100755
--- a/scripts/pull-build-rsync
+++ b/scripts/pull-build-rsync
@@ -20,6 +20,7 @@ git checkout master
 git reset --hard origin/master
 
 
+./scripts/update-version
 jekyll build --trace || exit 1
 
 
diff --git a/scripts/update-version b/scripts/update-version
new file mode 100755
index 0000000..3e60f50
--- /dev/null
+++ b/scripts/update-version
@@ -0,0 +1,4 @@
+#!/bin/bash
+
+git describe --dirty >| _data/version.yml
+