diff --git a/Classes/VirtualObject/Persistence/Query.php b/Classes/VirtualObject/Persistence/Query.php
index cf1f2bff..38ba6c8f 100644
--- a/Classes/VirtualObject/Persistence/Query.php
+++ b/Classes/VirtualObject/Persistence/Query.php
@@ -173,7 +173,7 @@ public function setConfiguration(ConfigurationInterface $configuration): QueryIn
         return $this;
     }
 
-    public function getConfiguration()
+    public function getConfiguration(): ?ConfigurationInterface
     {
         if (!$this->persistenceManager) {
             return null;
diff --git a/Classes/VirtualObject/Persistence/QueryInterface.php b/Classes/VirtualObject/Persistence/QueryInterface.php
index ecec6b49..7f55e123 100644
--- a/Classes/VirtualObject/Persistence/QueryInterface.php
+++ b/Classes/VirtualObject/Persistence/QueryInterface.php
@@ -220,5 +220,5 @@ public function setConfiguration(ConfigurationInterface $configuration): self;
      * @return ConfigurationInterface|null
      * @throws \Cundd\Rest\VirtualObject\Exception\MissingConfigurationException if the configuration is not set
      */
-    public function getConfiguration();
+    public function getConfiguration(): ?ConfigurationInterface;
 }