diff --git a/udata/core/dataset/api_fields.py b/udata/core/dataset/api_fields.py
index 330487ea58..378c41b811 100644
--- a/udata/core/dataset/api_fields.py
+++ b/udata/core/dataset/api_fields.py
@@ -138,10 +138,8 @@
 resources_order = api.as_list(fields.String(description='Resource ID'))
 
 temporal_coverage_fields = api.model('TemporalCoverage', {
-    'start': fields.ISODateTime(description='The temporal coverage start date',
-                                required=True),
-    'end': fields.ISODateTime(description='The temporal coverage end date',
-                              required=True),
+    'start': fields.ISODateTime(description='The temporal coverage start date', required=True),
+    'end': fields.ISODateTime(description='The temporal coverage end date'),
 })
 
 dataset_ref_fields = api.inherit('DatasetReference', base_reference, {
diff --git a/udata/forms/fields.py b/udata/forms/fields.py
index 600c908a64..fc3665230f 100644
--- a/udata/forms/fields.py
+++ b/udata/forms/fields.py
@@ -695,14 +695,22 @@ def process_formdata(self, valuelist):
             value = valuelist[0]
             if isinstance(value, str):
                 start, end = value.split(' - ')
+                if end is not None:
+                    end = parse(end, yearfirst=True).date()
+
                 self.data = db.DateRange(
                     start=parse(start, yearfirst=True).date(),
-                    end=parse(end, yearfirst=True).date(),
+                    end=end,
                 )
-            elif 'start' in value and 'end' in value:
+            elif 'start' in value:
+                if value.get('end', None):
+                    end = parse(value['end'], yearfirst=True).date()
+                else:
+                    end = None
+
                 self.data = db.DateRange(
                     start=parse(value['start'], yearfirst=True).date(),
-                    end=parse(value['end'], yearfirst=True).date(),
+                    end=end,
                 )
             else:
                 raise validators.ValidationError(
diff --git a/udata/tests/api/test_datasets_api.py b/udata/tests/api/test_datasets_api.py
index d31821ca81..c03e294039 100644
--- a/udata/tests/api/test_datasets_api.py
+++ b/udata/tests/api/test_datasets_api.py
@@ -613,6 +613,32 @@ def test_dataset_api_update_deleted(self):
         self.assertEqual(Dataset.objects.first().description,
                          dataset.description)
 
+
+    def test_update_temporal_coverage(self):
+        user = self.login()
+        dataset = DatasetFactory(owner=user)
+        data = dataset.to_dict()
+        data['temporal_coverage'] = {
+            'start': '2024-01-01',
+            'end': '2024-01-31',
+        }
+        response = self.put(url_for('api.dataset', dataset=dataset), data)
+        self.assert200(response)
+
+        dataset.reload()
+        self.assertEqual('2024-01-01', str(dataset.temporal_coverage.start))
+        self.assertEqual('2024-01-31', str(dataset.temporal_coverage.end))
+
+        data = dataset.to_dict()
+        data['temporal_coverage'] = { 'start': '2024-01-01', 'end': None }
+        response = self.put(url_for('api.dataset', dataset=dataset), data)
+        self.assert200(response)
+
+        dataset.reload()
+        self.assertEqual('2024-01-01', str(dataset.temporal_coverage.start))
+        self.assertIsNone(dataset.temporal_coverage.end)
+
+
     def test_dataset_api_update_contact_point(self):
         '''It should update a dataset from the API'''
         self.login()