[ci skip] Add missing upgrade step from 2.1.4 to 2.2.0 in the docs
diff --git a/user_guide_src/source/installation/upgrade_220.rst b/user_guide_src/source/installation/upgrade_220.rst
new file mode 100644
index 0000000..beb7bd7
--- /dev/null
+++ b/user_guide_src/source/installation/upgrade_220.rst
@@ -0,0 +1,21 @@
+#############################
+Upgrading from 2.1.4 to 2.2.0
+#############################
+
+.. note:: The :doc:`Encrypt Class <libraries/encrypt>` now requires the
+ Mcrypt extension. If you were previously using the Encrypt Class
+ without Mcrypt, then this is a breaking change. You must install
+ the Mcrypt extension in order to upgrade. For information on
+ installing Mcrypt please see the PHP `documentation
+ <http://php.net/manual/en/mcrypt.setup.php>`.
+
+Before performing an update you should take your site offline by
+replacing the index.php file with a static one.
+
+Step 1: Update your CodeIgniter files
+=====================================
+
+Replace all files and directories in your "system" folder.
+
+.. note:: If you have any custom developed files in these folders please
+ make copies of them first.
\ No newline at end of file
diff --git a/user_guide_src/source/installation/upgrade_300.rst b/user_guide_src/source/installation/upgrade_300.rst
index 549adfe..0aaadee 100644
--- a/user_guide_src/source/installation/upgrade_300.rst
+++ b/user_guide_src/source/installation/upgrade_300.rst
@@ -1,5 +1,5 @@
#############################
-Upgrading from 2.1.4 to 3.0.0
+Upgrading from 2.2.0 to 3.0.0
#############################
.. note:: These upgrade notes are for a version that is yet to be released.