diff --git a/user_guide_src/source/general/credits.rst b/user_guide_src/source/general/credits.rst
index d22e3a9..d0f14b3 100644
--- a/user_guide_src/source/general/credits.rst
+++ b/user_guide_src/source/general/credits.rst
@@ -2,17 +2,17 @@
 Credits
 #######
 
-CodeIgniter was originally developed by `Rick Ellis <http://www.ellislab.com/>`_
-(CEO of `EllisLab, Inc. <http://ellislab.com/>`_). The framework was written for
+CodeIgniter was originally developed by `Rick Ellis <https://ellislab.com/>`_
+(CEO of `EllisLab, Inc. <https://ellislab.com/>`_). The framework was written for
 performance in the real world, with many of the class libraries, helpers, and
 sub-systems borrowed from the code-base of `ExpressionEngine
-<http://www.expressionengine.com/>`_.
+<https://ellislab.com/expressionengine>`_.
 
 It was, for years, developed and maintained by EllisLab, the ExpressionEngine
 Development Team and a group of community members called the Reactor Team.
 
 In 2014, CodeIgniter was acquired by the `British Columbia Institute of Technology
-<http://bcit.ca/>`_ and was then officially announced as a community-maintained
+<http://www.bcit.ca/>`_ and was then officially announced as a community-maintained
 project.
 
 Bleeding edge development is spearheaded by the handpicked contributors
diff --git a/user_guide_src/source/general/environments.rst b/user_guide_src/source/general/environments.rst
index 1ce4fde..f5a4f61 100644
--- a/user_guide_src/source/general/environments.rst
+++ b/user_guide_src/source/general/environments.rst
@@ -48,5 +48,5 @@
 Optionally, you can have CodeIgniter load environment-specific
 configuration files. This may be useful for managing things like
 differing API keys across multiple environments. This is described in
-more detail in the environment section of the `Config
-Class <../libraries/config.html#environments>`_ documentation.
\ No newline at end of file
+more detail in the environment section of the :doc:`Config
+Class <../libraries/config#environments>`_ documentation.
\ No newline at end of file
diff --git a/user_guide_src/source/general/requirements.rst b/user_guide_src/source/general/requirements.rst
index e3f73db..f90cdd3 100644
--- a/user_guide_src/source/general/requirements.rst
+++ b/user_guide_src/source/general/requirements.rst
@@ -2,7 +2,7 @@
 Server Requirements
 ###################
 
-`PHP <http://www.php.net/>`_ version 5.4 or newer is recommended.
+`PHP <http://php.net/>`_ version 5.4 or newer is recommended.
 
 It should work on 5.2.4 as well, but we strongly advise you NOT to run
 such old versions of PHP, because of potential security and performance