diff --git a/toolbar_themes.install b/toolbar_themes.install
index 3d54488..1c71a0b 100644
--- a/toolbar_themes.install
+++ b/toolbar_themes.install
@@ -1,5 +1,7 @@
 <?php
 
+use Drupal\Core\Session\AccountInterface;
+
 /**
  * Implements hook_modules_installed().
  * @param $modules
@@ -10,3 +12,19 @@ function toolbar_themes_modules_installed($modules) {
     drupal_flush_all_caches();
   }
 }
+
+/**
+ * Implements hook_install().
+ */
+function toolbar_themes_install() {
+  user_role_grant_permissions(AccountInterface::ANONYMOUS_ROLE, ['configure toolbar_themes']);
+  user_role_grant_permissions(AccountInterface::AUTHENTICATED_ROLE, ['configure toolbar_themes']);
+}
+
+/**
+ * Assign "Configure administration toolbar themes" permission to all roles.
+ */
+function toolbar_themes_update_8001() {
+  user_role_grant_permissions(AccountInterface::ANONYMOUS_ROLE, ['configure toolbar_themes']);
+  user_role_grant_permissions(AccountInterface::AUTHENTICATED_ROLE, ['configure toolbar_themes']);
+}
diff --git a/toolbar_themes.permissions.yml b/toolbar_themes.permissions.yml
new file mode 100644
index 0000000..534f050
--- /dev/null
+++ b/toolbar_themes.permissions.yml
@@ -0,0 +1,2 @@
+configure toolbar_themes:
+  title : 'Configure administration toolbar themes'
diff --git a/toolbar_themes.routing.yml b/toolbar_themes.routing.yml
index da7b1bc..50a8cae 100644
--- a/toolbar_themes.routing.yml
+++ b/toolbar_themes.routing.yml
@@ -4,4 +4,4 @@ toolbar_themes.settings:
     _form: '\Drupal\toolbar_themes\Form\ToolbarThemesSettingsForm'
     _title: 'Toolbar Themes'
   requirements:
-    _permission: 'access toolbar'
+    _permission: 'configure toolbar_themes'