diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index 8b74fa9..8249b63 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -59,6 +59,8 @@
    -  Added support to set an optional parameter in your callback rules
       of validation using the :doc:`Form Validation
       Library <libraries/form_validation>`.
+   -  Added a :doc:`Migration Library <libraries/migration>` to assist with applying
+      incremental updates to your database schema.
    -  Driver children can be located in any package path.
    -  Added max_filename_increment config setting for Upload library.
    -  CI_Loader::_ci_autoloader() is now a protected method.
@@ -152,14 +154,6 @@
    -  Added CSRF protection URI whitelisting.
    -  Fixed a bug where :doc:`Email library <libraries/email>`
       attachments with a "." in the name would using invalid MIME-types.
-   -  Added support for
-      pem,p10,p12,p7a,p7c,p7m,p7r,p7s,crt,crl,der,kdb,rsa,cer,sst,csr
-      Certs to mimes.php.
-   -  Added support pgp,gpg to mimes.php.
-   -  Added support 3gp, 3g2, mp4, wmv, f4v, vlc Video files to
-      mimes.php.
-   -  Added support m4a, aac, m4u, xspf, au, ac3, flac, ogg Audio files
-      to mimes.php.
 
 -  Helpers