diff --git a/_includes/calendar.html b/_includes/calendar.html
index 44f8625..d60f743 100644
--- a/_includes/calendar.html
+++ b/_includes/calendar.html
@@ -90,7 +90,7 @@
     var urlJSON = {
     {% for post in site.posts %}
     "{{ post.url | slice: 1, 10 | replace: '-', '/' | replace: '/0', '/' | strip }}": {
-        url: "{{ site.baseurl }}{{ post.url }}",
+        url: "{{ site.baseurl }}{{ post.url }}.html",
         excerpt: "{{ post.excerpt }}",
         index: {{ forloop.rindex }}
     },