diff --git a/CHANGELOG.md b/CHANGELOG.md
index c7dfff5..d6efec1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Change Log
 
+### 4.0.0 - 29 Oct 2019
+
+- Compatible with the 3.x branch, but removes support for old PHP versions and requires Symfony 4.
+
 ### 3.5.0 - 30 May 2019
 
 - Add `@default-table-fields` to specify the fields to use with the table formatter and other "human readable" output formats.
diff --git a/README.md b/README.md
index 59bcc7d..bd4cb89 100644
--- a/README.md
+++ b/README.md
@@ -8,10 +8,6 @@ Apply transformations to structured data to write output in different formats.
 [![Coverage Status](https://coveralls.io/repos/github/consolidation/output-formatters/badge.svg?branch=master)](https://coveralls.io/github/consolidation/output-formatters?branch=master)
 [![License](https://poser.pugx.org/consolidation/output-formatters/license)](https://packagist.org/packages/consolidation/output-formatters)
 
-## Component Status
-
-Currently in use in [Robo](https://github.com/consolidation/Robo) (1.x+), [Drush](https://github.com/drush-ops/drush) (9.x+) and [Terminus](https://github.com/pantheon-systems/terminus) (1.x+).
-
 ## Motivation
 
 Formatters are used to allow simple commandline tool commands to be implemented in a manner that is completely independent from the Symfony Console output interfaces.  A command receives its input via its method parameters, and returns its result as structured data (e.g. a php standard object or array).  The structured data is then formatted by a formatter, and the result is printed.
@@ -23,10 +19,9 @@ This process is managed by the [Consolidation/AnnotationCommand](https://github.
 This is a library intended to be used in some other project.  Require from your composer.json file:
 ```
     "require": {
-        "consolidation/output-formatters": "~3"
+        "consolidation/output-formatters": "^4"
     },
 ```
-If you require the feature that allows a data table to be automatically reduced to a single element when the `string` format is selected, then you should require version ^2 instead. In most other respects, the 1.x and 2.x versions are compatible. See the [CHANGELOG](CHANGELOG.md) for details.
 
 ## Example Formatter