diff --git a/classes/admin.php b/classes/admin.php
index 4b858add..0a6f07d4 100644
--- a/classes/admin.php
+++ b/classes/admin.php
@@ -191,7 +191,7 @@ class Admin
             }
         }
 
-        return $this->authorise();
+        return $this->authorize();
     }
 
     /**
@@ -201,12 +201,12 @@ class Admin
      *
      * @return bool
      */
-    public function authorise($action = 'admin.login')
+    public function authorize($action = 'admin.login')
     {
         $action = (array)$action;
 
         foreach ($action as $a) {
-            if ($this->user->authorise($a)) {
+            if ($this->user->authorize($a)) {
                 return true;
             }
         }
diff --git a/classes/controller.php b/classes/controller.php
index 4bb1dcc4..4385ca7b 100644
--- a/classes/controller.php
+++ b/classes/controller.php
@@ -325,7 +325,7 @@ class AdminController
      */
     protected function taskClearCache()
     {
-        if (!$this->authoriseTask('clear cache', ['admin.cache', 'admin.super'])) {
+        if (!$this->authorizeTask('clear cache', ['admin.cache', 'admin.super'])) {
             return;
         }
 
@@ -356,7 +356,7 @@ class AdminController
     protected function taskBackup()
     {
         $param_sep = $this->grav['config']->get('system.param_sep', ':');
-        if (!$this->authoriseTask('backup', ['admin.maintenance', 'admin.super'])) {
+        if (!$this->authorizeTask('backup', ['admin.maintenance', 'admin.super'])) {
             return;
         }
 
@@ -405,7 +405,7 @@ class AdminController
      */
     protected function taskFilterPages()
     {
-        if (!$this->authoriseTask('filter pages', ['admin.pages', 'admin.super'])) {
+        if (!$this->authorizeTask('filter pages', ['admin.pages', 'admin.super'])) {
             return;
         }
 
@@ -492,7 +492,7 @@ class AdminController
      */
     protected function taskListmedia()
     {
-        if (!$this->authoriseTask('list media', ['admin.pages', 'admin.super'])) {
+        if (!$this->authorizeTask('list media', ['admin.pages', 'admin.super'])) {
             return;
         }
 
@@ -517,7 +517,7 @@ class AdminController
      */
     protected function taskAddmedia()
     {
-        if (!$this->authoriseTask('add media', ['admin.pages', 'admin.super'])) {
+        if (!$this->authorizeTask('add media', ['admin.pages', 'admin.super'])) {
             return;
         }
 
@@ -584,7 +584,7 @@ class AdminController
      */
     protected function taskDelmedia()
     {
-        if (!$this->authoriseTask('delete media', ['admin.pages', 'admin.super'])) {
+        if (!$this->authorizeTask('delete media', ['admin.pages', 'admin.super'])) {
             return;
         }
 
@@ -643,7 +643,7 @@ class AdminController
      */
     protected function taskProcessMarkdown()
     {
-//        if (!$this->authoriseTask('process markdown', ['admin.pages', 'admin.super'])) {
+//        if (!$this->authorizeTask('process markdown', ['admin.pages', 'admin.super'])) {
 //            return;
 //        }
 
@@ -674,7 +674,7 @@ class AdminController
      */
     public function taskEnable()
     {
-        if (!$this->authoriseTask('enable plugin', ['admin.plugins', 'admin.super'])) {
+        if (!$this->authorizeTask('enable plugin', ['admin.plugins', 'admin.super'])) {
             return;
         }
 
@@ -698,7 +698,7 @@ class AdminController
      */
     public function taskDisable()
     {
-        if (!$this->authoriseTask('disable plugin', ['admin.plugins', 'admin.super'])) {
+        if (!$this->authorizeTask('disable plugin', ['admin.plugins', 'admin.super'])) {
             return;
         }
 
@@ -722,7 +722,7 @@ class AdminController
      */
     public function taskActivate()
     {
-        if (!$this->authoriseTask('activate theme', ['admin.themes', 'admin.super'])) {
+        if (!$this->authorizeTask('activate theme', ['admin.themes', 'admin.super'])) {
             return;
         }
 
@@ -762,7 +762,7 @@ class AdminController
     public function taskInstall()
     {
         $type = $this->view === 'plugins' ? 'plugins' : 'themes';
-        if (!$this->authoriseTask('install ' . $type, ['admin.' . $type, 'admin.super'])) {
+        if (!$this->authorizeTask('install ' . $type, ['admin.' . $type, 'admin.super'])) {
             return;
         }
 
@@ -792,7 +792,7 @@ class AdminController
     {
         require_once __DIR__ . '/gpm.php';
 
-        if (!$this->authoriseTask('install grav', ['admin.super'])) {
+        if (!$this->authorizeTask('install grav', ['admin.super'])) {
             return;
         }
 
@@ -835,7 +835,7 @@ class AdminController
         }
 
         foreach ($permissions as $type => $p) {
-            if (!$this->authoriseTask('update ' . $type , $p)) {
+            if (!$this->authorizeTask('update ' . $type , $p)) {
                 return;
             }
         }
@@ -871,7 +871,7 @@ class AdminController
     public function taskUninstall()
     {
         $type = $this->view === 'plugins' ? 'plugins' : 'themes';
-        if (!$this->authoriseTask('uninstall ' . $type, ['admin.' . $type, 'admin.super'])) {
+        if (!$this->authorizeTask('uninstall ' . $type, ['admin.' . $type, 'admin.super'])) {
             return;
         }
 
@@ -899,7 +899,7 @@ class AdminController
      */
     public function taskSave()
     {
-        if (!$this->authoriseTask('save', $this->dataPermissions())) {
+        if (!$this->authorizeTask('save', $this->dataPermissions())) {
             return;
         }
 
@@ -1026,7 +1026,7 @@ class AdminController
      */
     protected function taskCopy()
     {
-        if (!$this->authoriseTask('copy page', ['admin.pages', 'admin.super'])) {
+        if (!$this->authorizeTask('copy page', ['admin.pages', 'admin.super'])) {
             return;
         }
 
@@ -1084,7 +1084,7 @@ class AdminController
      */
     protected function taskReorder()
     {
-        if (!$this->authoriseTask('reorder pages', ['admin.pages', 'admin.super'])) {
+        if (!$this->authorizeTask('reorder pages', ['admin.pages', 'admin.super'])) {
             return;
         }
 
@@ -1105,7 +1105,7 @@ class AdminController
      */
     protected function taskDelete()
     {
-        if (!$this->authoriseTask('delete page', ['admin.pages', 'admin.super'])) {
+        if (!$this->authorizeTask('delete page', ['admin.pages', 'admin.super'])) {
             return;
         }
 
@@ -1180,7 +1180,7 @@ class AdminController
      * @return bool True if the action was performed.
      */
     protected function taskSaveas() {
-        if (!$this->authoriseTask('save', $this->dataPermissions())) {
+        if (!$this->authorizeTask('save', $this->dataPermissions())) {
             return;
         }
 
@@ -1397,9 +1397,9 @@ class AdminController
      * @param array $permissions The permissions given
      * @return bool True if authorized. False if not.
      */
-    protected function authoriseTask($task = '', $permissions = [])
+    protected function authorizeTask($task = '', $permissions = [])
     {
-        if (!$this->admin->authorise($permissions)) {
+        if (!$this->admin->authorize($permissions)) {
             if ($this->grav['uri']->extension() === 'json')
                 $this->admin->json_response = ['status' => 'unauthorized', 'message' => $this->admin->translate('PLUGIN_ADMIN.INSUFFICIENT_PERMISSIONS_FOR_TASK') . ' ' . $task . '.'];
             else
diff --git a/themes/grav/templates/partials/nav.html.twig b/themes/grav/templates/partials/nav.html.twig
index 173feefe..675518ce 100644
--- a/themes/grav/templates/partials/nav.html.twig
+++ b/themes/grav/templates/partials/nav.html.twig
@@ -3,7 +3,7 @@
         <h3><a href="{{ base_url_relative }}">{{ "PLUGIN_ADMIN.GRAV_ADMIN"|tu }}</a> <a target="_blank" href="{{ base_url_relative_frontend }}"><i class="fa fa-fw fa-angle-double-right"></i></a></h3>
     </div>
 
-    {#{% if admin.authorise %}#}
+    {#{% if admin.authorize %}#}
     <div id="admin-user-details">
         <a href="{{ base_url_relative }}/users/{{ admin.user.username }}">
             <img src="http://www.gravatar.com/avatar/{{ admin.user.email|md5 }}?s=32" />
diff --git a/themes/grav/templates/partials/toolbar.html.twig b/themes/grav/templates/partials/toolbar.html.twig
index d9427638..9f138c3e 100644
--- a/themes/grav/templates/partials/toolbar.html.twig
+++ b/themes/grav/templates/partials/toolbar.html.twig
@@ -8,7 +8,7 @@
     Admin
 </h2>
 
-{% if admin.authorise %}
+{% if admin.authorize %}
 <span class="user-details">
 <img src="http://www.gravatar.com/avatar/{{ admin.user.email|md5 }}?s=50" /><span class="badge">6</span><span class="hide-small">Hi, {{ admin.user.fullname }}<span> <a href="{{ base_url_relative }}/task{{ config.system.param_sep }}logout">{{ "PLUGIN_ADMIN.LOGOUT"|tu }}</a>
 </span>