diff --git a/sitemap.xml b/sitemap.xml
index 92027b5..b9a5a4d 100644
--- a/sitemap.xml
+++ b/sitemap.xml
@@ -14,7 +14,7 @@
 </url>
 <url>
   <loc>http://www.restapitutorial.com/lessons/restquicktips.html</loc>
-  <lastmod>2014-11-17T17:04:15+07:00</lastmod>
+  <lastmod>2014-11-17T17:04:15-07:00</lastmod>
 </url>
 <url>
   <loc>http://www.restapitutorial.com/lessons/httpmethods.html</loc>