diff --git a/framework/core/src/Settings/MemoryCacheSettingsRepository.php b/framework/core/src/Settings/MemoryCacheSettingsRepository.php
index fda2cf2f0..0aae7ad1a 100644
--- a/framework/core/src/Settings/MemoryCacheSettingsRepository.php
+++ b/framework/core/src/Settings/MemoryCacheSettingsRepository.php
@@ -26,7 +26,7 @@ class MemoryCacheSettingsRepository implements SettingsRepositoryInterface
         $this->inner = $inner;
     }
 
-    public function all()
+    public function all(): array
     {
         if (! $this->isCached) {
             $this->cache = $this->inner->all();