Update copyright year
diff --git a/source/_includes/footer.html b/source/_includes/footer.html
index 71930dd..ba54499 100644
--- a/source/_includes/footer.html
+++ b/source/_includes/footer.html
@@ -1,7 +1,7 @@
<footer class="container">
<div class="col-md-12">
- Copyright © 2000-2018 <a href="http://www.apache.org/">The Apache Software Foundation </a>.
+ Copyright © 2000-2021 <a href="http://www.apache.org/">The Apache Software Foundation </a>.
All Rights Reserved.
</div>
<div class="col-md-12">