diff --git a/Installation-Guide.md b/Installation-Guide.md
index b735196..b13da7d 100644
--- a/Installation-Guide.md
+++ b/Installation-Guide.md
@@ -6,8 +6,8 @@
   * [mod_rewrite](https://httpd.apache.org/docs/current/mod/mod_rewrite.html)
 * [PHP](http://php.net) >= 5.4
   * [gettext](https://www.php.net/manual/book.gettext.php)
-  * [mysqlnd](http://php.net/manual/en/book.mysqlnd.php)
-  * [intl](http://php.net/manual/en/book.intl.php)
+  * [mysqlnd](https://www.php.net/manual/book.mysqlnd.php)
+  * [intl](https://www.php.net/manual/book.intl.php)
   * [imagick](http://pecl.php.net/package/imagick)
 * [MySQL](https://www.mysql.com) or [MariaDB](https://mariadb.org)