diff --git a/code/Model/EditableFormField.php b/code/Model/EditableFormField.php
index 91b7cdd..41fe13e 100755
--- a/code/Model/EditableFormField.php
+++ b/code/Model/EditableFormField.php
@@ -9,7 +9,6 @@ use SilverStripe\Core\ClassInfo;
 use SilverStripe\Core\Config\Config;
 use SilverStripe\Core\Convert;
 use SilverStripe\Core\Manifest\ModuleLoader;
-use SilverStripe\Dev\Deprecation;
 use SilverStripe\Forms\CheckboxField;
 use SilverStripe\Forms\DropdownField;
 use SilverStripe\Forms\FieldList;
@@ -567,36 +566,6 @@ class EditableFormField extends DataObject
         return stripos($this->ID, 'new') === 0;
     }
 
-    /**
-     * @deprecated since version 4.0
-     */
-    public function getSettings()
-    {
-        Deprecation::notice('4.0', 'getSettings is deprecated');
-        return (!empty($this->CustomSettings)) ? unserialize($this->CustomSettings) : array();
-    }
-
-    /**
-     * @deprecated since version 4.0
-     */
-    public function setSettings($settings = array())
-    {
-        Deprecation::notice('4.0', 'setSettings is deprecated');
-        $this->CustomSettings = serialize($settings);
-    }
-
-    /**
-     * @deprecated since version 4.0
-     */
-    public function setSetting($key, $value)
-    {
-        Deprecation::notice('4.0', "setSetting({$key}) is deprecated");
-        $settings = $this->getSettings();
-        $settings[$key] = $value;
-
-        $this->setSettings($settings);
-    }
-
     /**
      * Set the allowed css classes for the extraClass custom setting
      *
@@ -611,22 +580,6 @@ class EditableFormField extends DataObject
         }
     }
 
-    /**
-     * @deprecated since version 4.0
-     */
-    public function getSetting($setting)
-    {
-        Deprecation::notice("4.0", "getSetting({$setting}) is deprecated");
-
-        $settings = $this->getSettings();
-        if (isset($settings) && count($settings) > 0) {
-            if (isset($settings[$setting])) {
-                return $settings[$setting];
-            }
-        }
-        return '';
-    }
-
     /**
      * Get the path to the icon for this field type, relative to the site root.
      *
@@ -715,26 +668,6 @@ class EditableFormField extends DataObject
         return $this->i18n_singular_name() . ' (' . $this->Title . ')';
     }
 
-    /**
-     * @deprecated since version 4.0
-     */
-    public function getFieldName($field = false)
-    {
-        Deprecation::notice('4.0', "getFieldName({$field}) is deprecated");
-        return ($field) ? "Fields[".$this->ID."][".$field."]" : "Fields[".$this->ID."]";
-    }
-
-    /**
-     * @deprecated since version 4.0
-     */
-    public function getSettingName($field)
-    {
-        Deprecation::notice('4.0', "getSettingName({$field}) is deprecated");
-        $name = $this->getFieldName('CustomSettings');
-
-        return $name . '[' . $field .']';
-    }
-
     /**
      * Append custom validation fields to the default 'Validation'
      * section in the editable options view
diff --git a/docs/en/index.md b/docs/en/index.md
index ebd22da..6591b00 100644
--- a/docs/en/index.md
+++ b/docs/en/index.md
@@ -1,6 +1,6 @@
 # UserForms
 
-UserForms enables CMS users to create dynamic forms via a drag and drop interface 
+UserForms enables CMS users to create dynamic forms via a drag and drop interface
 and without getting involved in any PHP code.
 
 ## Maintainer Contact
@@ -28,11 +28,12 @@ See the "require" section of [composer.json](https://github.com/silverstripe/sil
  * [Troubleshooting](troubleshooting)
  * [User Documentation](userguide/index.md)
  * [Compiling Front-End Files](compiling-front-end-files.md)
+ * [Upgrading to SilverStripe 4](upgrading.md)
 
 ## Thanks
 
-I would like to thank everyone who has contributed to the module, bugfixers, 
+I would like to thank everyone who has contributed to the module, bugfixers,
 testers, clients who use the module and everyone that submits new features.
 
-A big thanks goes out to [Jan Düsedau](http://eformation.de) for drawing 
+A big thanks goes out to [Jan Düsedau](http://eformation.de) for drawing
 the custom icon set for the form fields.
diff --git a/docs/en/upgrading.md b/docs/en/upgrading.md
new file mode 100644
index 0000000..fce68bc
--- /dev/null
+++ b/docs/en/upgrading.md
@@ -0,0 +1,24 @@
+# Upgrading to SilverStripe 4
+
+## API changes
+
+The SilverStripe 4 compatible version of UserForms (5.x) introduces some breaking API changes:
+
+* Namespaces are added. Please use the SilverStripe upgrader to automatically update references in your code.
+* Previously deprecated code from UserForms 4.x has been removed:
+  * `EditableFormField::getSettings()`
+  * `EditableFormField::setSettings()`
+  * `EditableFormField::setSetting()`
+  * `EditableFormField::getSetting()`
+  * `EditableFormField::getFieldName()`
+  * `EditableFormField::getSettingName()`
+
+The frontend JavaScript and SASS assets have been converted from Compass to
+[Webpack](https://github.com/silverstripe/webpack-config), and now live in the `client/` folder. Please
+[see here](https://docs.silverstripe.org/en/4/contributing/build_tooling/) for information on this build toolchain.
+
+## Data migration
+
+UserForms 5.0 includes a legacy class name remapping configuration file (legacy.yml) as well as `$table_name`
+configuration for every DataObject to ensure that existing data in your database will remain unchanged. This
+should help to ensure that your upgrade process from UserForms 4.x on SilverStripe 3 is as seamless as possible.