diff --git a/src/Entity/Field/DatetimeTrait.php b/src/Entity/Field/DatetimeTrait.php
index 05d1355..501c69c 100644
--- a/src/Entity/Field/DatetimeTrait.php
+++ b/src/Entity/Field/DatetimeTrait.php
@@ -26,7 +26,7 @@ trait DatetimeTrait
         return $obj;
     }
 
-    public function setTime($hour, $minute, $second = 0, $microsecond = 0) : \DateTimeInterface
+    public function setTime($hour, $minute, $second = 0, $microsecond = 0) : \DateTime
     {
         $fromParent = parent::setTime($hour, $minute, $second, $microsecond);
 
@@ -65,4 +65,4 @@ trait DatetimeTrait
     {
         return $this;
     }
-}
\ No newline at end of file
+}