diff --git a/src/Bundle/ChillMainBundle/Export/AggregatorInterface.php b/src/Bundle/ChillMainBundle/Export/AggregatorInterface.php
index e905a6bd0..882ebd245 100644
--- a/src/Bundle/ChillMainBundle/Export/AggregatorInterface.php
+++ b/src/Bundle/ChillMainBundle/Export/AggregatorInterface.php
@@ -96,7 +96,7 @@ interface AggregatorInterface extends ModifierInterface
      *
      * @return callable(mixed $value): (string|int|\DateTimeInterface|TranslatableInterface) where the first argument is the value, and the function should return the label to show in the formatted file. Example : `function($countryCode) use ($countries) { return $countries[$countryCode]->getName(); }`
      */
-    public function getLabels($key, array $values, mixed $data): callable;
+    public function getLabels(string $key, array $values, mixed $data): callable;
 
     /**
      * give the list of keys the current export added to the queryBuilder in
diff --git a/src/Bundle/ChillMainBundle/Export/ExportInterface.php b/src/Bundle/ChillMainBundle/Export/ExportInterface.php
index 02338d7cb..c0fe0b3fa 100644
--- a/src/Bundle/ChillMainBundle/Export/ExportInterface.php
+++ b/src/Bundle/ChillMainBundle/Export/ExportInterface.php
@@ -101,7 +101,7 @@ interface ExportInterface extends ExportElementInterface
      *
      * @return (callable(string|int|float|'_header'|null $value): string|int|\DateTimeInterface|TranslatableInterface) where the first argument is the value, and the function should return the label to show in the formatted file. Example : `function($countryCode) use ($countries) { return $countries[$countryCode]->getName(); }`
      */
-    public function getLabels($key, array $values, mixed $data);
+    public function getLabels(string $key, array $values, mixed $data);
 
     /**
      * give the list of keys the current export added to the queryBuilder in
diff --git a/src/Bundle/ChillMainBundle/Export/FormatterInterface.php b/src/Bundle/ChillMainBundle/Export/FormatterInterface.php
index 41c08ae37..e45549758 100644
--- a/src/Bundle/ChillMainBundle/Export/FormatterInterface.php
+++ b/src/Bundle/ChillMainBundle/Export/FormatterInterface.php
@@ -59,9 +59,9 @@ interface FormatterInterface
      * @deprecated use generate instead
      */
     public function getResponse(
-        $result,
-        $formatterData,
-        $exportAlias,
+        array $result,
+        array $formatterData,
+        string $exportAlias,
         array $exportData,
         array $filtersData,
         array $aggregatorsData,