diff --git a/_posts/16-08-01-Sites.md b/_posts/16-08-01-Sites.md
index 48c8142..664a865 100644
--- a/_posts/16-08-01-Sites.md
+++ b/_posts/16-08-01-Sites.md
@@ -8,7 +8,7 @@ title:   Other Useful Resources
 
 ### Cheatsheets
 
-* [PHP Cheatsheets](http://phpcheatsheets.com/) - for variable comparisons, arithmetics and variable testing in various PHP versions.
+* [PHP Cheatsheets](https://phpcheatsheets.com/) - for variable comparisons, arithmetics and variable testing in various PHP versions.
 * [Modern PHP Cheatsheet](https://github.com/smknstd/modern-php-cheatsheet) - documents modern (PHP 7.0+) idioms in a unified document.
 * [OWASP Security Cheatsheets](https://owasp.org/www-project-cheat-sheets/) - provides a concise collection of high value information on specific application security topics.