diff --git a/src/Form/SourceForm.php b/src/Form/SourceForm.php
index 61e45d92ec5eae0231852aca12c4d5859d87d910..b474f29a2263fb9bcce186d61aec355cd1724aee 100755
--- a/src/Form/SourceForm.php
+++ b/src/Form/SourceForm.php
@@ -106,7 +106,7 @@ class SourceFormHydrator implements HydratorInterface
      *
      * @return array
      */
-    public function extract($object)
+    public function extract($object): array
     {
         $data = [
             'id'         => $object->getId(),
diff --git a/src/Form/TableForm.php b/src/Form/TableForm.php
index 42013b44c962c7a9776bad8965d8eef3f89b04da..8aa514e13ebd0276de49e98758d01dc9ebe8cb31 100755
--- a/src/Form/TableForm.php
+++ b/src/Form/TableForm.php
@@ -137,7 +137,7 @@ class TableFormHydrator implements HydratorInterface
      *
      * @return array
      */
-    public function extract($object)
+    public function extract($object): array
     {
         $data = [
             'name'           => $object->getName(),