diff --git a/_posts/05-03-01-Date-and-Time.md b/_posts/05-03-01-Date-and-Time.md
index 499d074..83d4373 100644
--- a/_posts/05-03-01-Date-and-Time.md
+++ b/_posts/05-03-01-Date-and-Time.md
@@ -61,10 +61,10 @@ foreach ($periodIterator as $date) {
 }
 {% endhighlight %}
 
-A popular PHP API extension is [Carbon](http://carbon.nesbot.com). It inherits everything in the DateTime class, so involves minimal code alterations, but extra features include Localization support, further ways to add, subtract and format a DateTime object, plus a means to test your code by simulating a date and time of your choosing.
+A popular PHP API extension is [Carbon](https://carbon.nesbot.com/). It inherits everything in the DateTime class, so involves minimal code alterations, but extra features include Localization support, further ways to add, subtract and format a DateTime object, plus a means to test your code by simulating a date and time of your choosing.
 
 * [Read about DateTime][datetime]
 * [Read about date formatting][dateformat] (accepted date format string options)
 
-[datetime]: http://php.net/book.datetime
-[dateformat]: http://php.net/function.date
+[datetime]: https://secure.php.net/book.datetime
+[dateformat]: https://secure.php.net/function.date