diff --git a/readme.md b/readme.md
index 68535c5..4b5caac 100644
--- a/readme.md
+++ b/readme.md
@@ -1,4 +1,5 @@
 # Wonde PHP Client
+
 Documentation https://wonde.com/docs/api/1.0/
 
 ## Installation
@@ -9,13 +10,14 @@ Using Composer:
 
 ```json
 {
-    "require": {
-      "wondeltd/php-client": "1.*"
-    }
+  "require": {
+    "wondeltd/php-client": "1.*"
+  }
 }
 ```
 
-or 
+or
+
 ```bash
 composer require wondeltd/php-client
 ```
@@ -44,10 +46,10 @@ foreach ($client->schools->all() as $school) {
     // Display school name
     echo $school->name . PHP_EOL;
 }
-
 ```
 
 ### Single School
+
 ```php
 $client = new \Wonde\Client('TOKEN_GOES_HERE');
 
@@ -214,8 +216,8 @@ foreach ($school->achievementsAttributes->all() as $achievement) {
 }
 ```
 
-
 ### Assessment - (BETA)
+
 This endpoint is included in the stable release but is likely to change in the future. Please contact support for more information.
 
 ```php
@@ -238,7 +240,7 @@ foreach ($school->assessment->templates->all() as $resultsets) {
     echo $resultsets->id . PHP_EOL;
 }
 
-// Get results 
+// Get results
 foreach ($school->assessment->results->all() as $results) {
     echo $results->id . PHP_EOL;
 }
@@ -494,19 +496,6 @@ foreach ($school->groups->all() as $group) {
 }
 ```
 
-### Historical Groups
-
-```php
-$client = new \Wonde\Client('TOKEN_GOES_HERE');
-
-$school = $client->school('SCHOOL_ID_GOES_HERE');
-
-// Get groups
-foreach ($school->groupsHistorical->all() as $historicalGroup) {
-    echo $historicalGroup->name . PHP_EOL;
-}
-```
-
 ### Lessons
 
 ```php
@@ -658,4 +647,4 @@ foreach ($school->subjects->all() as $subject) {
 $client = new \Wonde\Client('TOKEN_GOES_HERE');
 
 $metaObject = $client->meta->get('SCHOOL_ID_GOES_HERE');
-```
\ No newline at end of file
+```
diff --git a/src/Endpoints/GroupsHistorical.php b/src/Endpoints/GroupsHistorical.php
deleted file mode 100644
index 57d0abd..0000000
--- a/src/Endpoints/GroupsHistorical.php
+++ /dev/null
@@ -1,9 +0,0 @@
-<?php namespace Wonde\Endpoints;
-
-class GroupsHistorical extends BootstrapEndpoint
-{
-    /**
-     * @var string
-     */
-    public $uri = 'groups-historical/';
-}
\ No newline at end of file
diff --git a/src/Endpoints/Schools.php b/src/Endpoints/Schools.php
index caf37d7..435e433 100644
--- a/src/Endpoints/Schools.php
+++ b/src/Endpoints/Schools.php
@@ -57,11 +57,6 @@ class Schools extends BootstrapEndpoint
      */
     public $groups;
 
-    /**
-     * @var GroupsHistorical
-     */
-    public $groupsHistorical;
-
     /**
      * @var Lessons
      */
@@ -161,7 +156,6 @@ public function __construct($token, $id = false)
         $this->employeeAbsences       = new EmployeeAbsences($token, $this->uri);
         $this->events                 = new Events($token, $this->uri);
         $this->groups                 = new Groups($token, $this->uri);
-        $this->groupsHistorical       = new GroupsHistorical($token, $this->uri);
         $this->lessons                = new Lessons($token, $this->uri);
         $this->lessonAttendance       = new LessonAttendance($token, $this->uri);
         $this->medicalConditions      = new MedicalConditions($token, $this->uri);