diff --git a/tests/test_marshmallow.py b/tests/test_marshmallow.py
index aeb4a086..c5ba081d 100644
--- a/tests/test_marshmallow.py
+++ b/tests/test_marshmallow.py
@@ -75,6 +75,35 @@ def test_customize_params(self):
         assert not ret.errors
         assert ret.data == {'birthday': datetime(1990, 10, 23)}
 
+    def test_customize_nested_and_container_params(self):
+        @self.instance.register
+        class Accessory(EmbeddedDocument):
+            brief = fields.StrField(attribute='id', required=True)
+            value = fields.IntField()
+
+        @self.instance.register
+        class Bag(Document):
+            id = fields.EmbeddedField(Accessory, attribute='_id', required=True)
+            names = fields.ListField(fields.StringField())
+            content = fields.ListField(fields.EmbeddedField(Accessory))
+
+        ma_field = Bag.schema.fields['id'].as_marshmallow_field(params={
+            'load_only': True,
+            'params': {'value': {'dump_only': True}}})
+        assert ma_field.load_only is True
+        assert ma_field.nested._declared_fields['value'].dump_only
+        ma_field = Bag.schema.fields['names'].as_marshmallow_field(params={
+            'load_only': True,
+            'params': {'dump_only': True}})
+        assert ma_field.load_only is True
+        assert ma_field.container.dump_only is True
+        ma_field = Bag.schema.fields['content'].as_marshmallow_field(params={
+            'load_only': True,
+            'params': {'required': True, 'params': {'value': {'dump_only': True}}}})
+        assert ma_field.load_only is True
+        assert ma_field.container.required is True
+        assert ma_field.container.nested._declared_fields['value'].dump_only
+
     def test_keep_attributes(self):
         @self.instance.register
         class Vehicle(Document):
diff --git a/umongo/fields.py b/umongo/fields.py
index 9587a03c..dc2b82cc 100644
--- a/umongo/fields.py
+++ b/umongo/fields.py
@@ -113,9 +113,13 @@ def as_marshmallow_field(self, params=None, mongo_world=False, **kwargs):
         # difference (`_id` vs `id`)
         field_kwargs = self._extract_marshmallow_field_params(mongo_world)
         if params:
+            container_params = params.pop('params', None)
             field_kwargs.update(params)
-        return ma_fields.List(self.container.as_marshmallow_field(
-            mongo_world=mongo_world, **kwargs), **field_kwargs)
+        else:
+            container_params = None
+        container_ma_schema = self.container.as_marshmallow_field(
+            mongo_world=mongo_world, params=container_params, **kwargs)
+        return ma_fields.List(container_ma_schema, **field_kwargs)
 
     def _required_validate(self, value):
         if value is missing or not hasattr(self.container, '_required_validate'):