diff --git a/src/Settings/DatabaseSettingsRepository.php b/src/Settings/DatabaseSettingsRepository.php
index b6e246055..44d1495ca 100644
--- a/src/Settings/DatabaseSettingsRepository.php
+++ b/src/Settings/DatabaseSettingsRepository.php
@@ -20,7 +20,7 @@ class DatabaseSettingsRepository implements SettingsRepositoryInterface
         $this->database = $connection;
     }
 
-    public function all()
+    public function all(): array
     {
         return $this->database->table('settings')->pluck('value', 'key')->all();
     }
diff --git a/src/Settings/SettingsRepositoryInterface.php b/src/Settings/SettingsRepositoryInterface.php
index 2a4aa10f0..8bb3d7ab2 100644
--- a/src/Settings/SettingsRepositoryInterface.php
+++ b/src/Settings/SettingsRepositoryInterface.php
@@ -11,7 +11,7 @@ namespace Flarum\Settings;
 
 interface SettingsRepositoryInterface
 {
-    public function all();
+    public function all(): array;
 
     public function get($key, $default = null);