diff --git a/src/Bundle/ChillPersonBundle/Serializer/Normalizer/PersonJsonNormalizerInterface.php b/src/Bundle/ChillPersonBundle/Serializer/Normalizer/PersonJsonNormalizerInterface.php
index 10ffa04d1..fd41752a8 100644
--- a/src/Bundle/ChillPersonBundle/Serializer/Normalizer/PersonJsonNormalizerInterface.php
+++ b/src/Bundle/ChillPersonBundle/Serializer/Normalizer/PersonJsonNormalizerInterface.php
@@ -21,12 +21,4 @@ interface PersonJsonNormalizerInterface extends
     DenormalizerInterface,
     NormalizerInterface
 {
-    public function denormalize($data, $type, $format = null, array $context = []);
-
-    public function normalize($person, $format = null, array $context = []);
-
-    public function supportsDenormalization($data, $type, $format = null);
-
-    public function supportsNormalization($data, $format = null): bool;
-
 }