diff --git a/docs/changelog.rst b/docs/changelog.rst
index 5b1728b5..9b59cd03 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -2,6 +2,14 @@
 CHANGELOG
 =========
 
+1.4.3    (2024-07-02)
+---------------------
+
+**Bug fix**
+
+- Fix to give multipart data as JSON data in custom contribution API
+
+
 1.4.2    (2024-07-02)
 ---------------------
 
diff --git a/georiviere/VERSION b/georiviere/VERSION
index c9929e36..3c80e4f0 100644
--- a/georiviere/VERSION
+++ b/georiviere/VERSION
@@ -1 +1 @@
-1.4.2
\ No newline at end of file
+1.4.3
\ No newline at end of file
diff --git a/georiviere/portal/tests/test_views/test_contribution.py b/georiviere/portal/tests/test_views/test_contribution.py
index bf61a220..8cf22ff9 100644
--- a/georiviere/portal/tests/test_views/test_contribution.py
+++ b/georiviere/portal/tests/test_views/test_contribution.py
@@ -384,9 +384,9 @@ def test_no_values_on_not_required(self):
         """Null and empty values should be accepted on non required fields"""
         data = {
             "station": self.station.pk,
-            self.string_field.key: None,
+            self.string_field.key: "",
             self.string_field_blank.key: "",
-            "field_boolean": None,
+            "field_boolean": "",
             "field_float": 1.1,
             "contributed_at": "2020-01-01T00:00"
         }
diff --git a/georiviere/portal/views/contribution.py b/georiviere/portal/views/contribution.py
index 249795fa..8272c7bc 100644
--- a/georiviere/portal/views/contribution.py
+++ b/georiviere/portal/views/contribution.py
@@ -189,7 +189,7 @@ def create_contribution(self, request, *args, **kwargs):
             custom_type = self.get_object()
             context["custom_type"] = custom_type
             # as data come from form, we need to clean None values in creation mode
-            data = {k: v for k, v in request.data.items() if v is not None}
+            data = {k: v for k, v in request.data.items() if v}
             serializer = self.get_serializer(data=data, context=context)
             if not serializer.is_valid():
                 return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)