diff --git a/pymisp/api.py b/pymisp/api.py
index 41ed157..038840a 100644
--- a/pymisp/api.py
+++ b/pymisp/api.py
@@ -550,7 +550,7 @@ class PyMISP:
         o.from_dict(**new_object)
         return o
 
-    def update_object(self, misp_object: MISPObject, object_id: Optional[int] = None, pythonify: bool = False) -> Union[Dict, MISPObject]:
+    def update_object(self, misp_object: MISPObject, object_id: Optional[int] = None, pythonify: bool = False, break_on_duplicate: bool = False) -> Union[Dict, MISPObject]:
         """Update an object on a MISP instance
 
         :param misp_object: object to update
@@ -561,7 +561,8 @@ class PyMISP:
             oid = get_uuid_or_id_from_abstract_misp(misp_object)
         else:
             oid = get_uuid_or_id_from_abstract_misp(object_id)
-        r = self._prepare_request('POST', f'objects/edit/{oid}', data=misp_object)
+        params = {'breakOnDuplicate': True} if break_on_duplicate else {}
+        r = self._prepare_request('POST', f'objects/edit/{oid}', data=misp_object, kw_params=params)
         updated_object = self._check_json_response(r)
         if not (self.global_pythonify or pythonify) or 'errors' in updated_object:
             return updated_object
diff --git a/tests/testlive_comprehensive.py b/tests/testlive_comprehensive.py
index 926d7cc..a2c684d 100644
--- a/tests/testlive_comprehensive.py
+++ b/tests/testlive_comprehensive.py
@@ -1480,16 +1480,36 @@ class TestComprehensive(unittest.TestCase):
             self.assertEqual(len(obj_attrs), 1, obj_attrs)
             self.assertEqual(r.name, 'file', r)
 
-            # Test break_on_duplicate at object level
+            # Test break_on_duplicate at object level for add_object
             fo_dup, peo_dup, _ = make_binary_objects('tests/viper-test-files/test_files/whoami.exe')
             r = self.user_misp_connector.add_object(first, peo_dup, break_on_duplicate=True)
             self.assertTrue("Duplicate object found" in r['errors'][1]['errors'], r)
 
-            # Test break on duplicate with breakOnDuplicate key in object
+            # Test break on duplicate with breakOnDuplicate key in object for add_object
             fo_dup.breakOnDuplicate = True
             r = self.user_misp_connector.add_object(first, fo_dup)
             self.assertTrue("Duplicate object found" in r['errors'][1]['errors'], r)
 
+            # Test break_on_duplicate at object level for update_object
+            obj1 = MISPObject('domain-ip')
+            obj1.add_attribute('ip', value="8.8.8.8")
+            obj1.add_attribute('domain', value="google.lu")
+            obj2 = MISPObject('domain-ip')
+            obj2.add_attribute('ip', value="8.8.8.8")
+            obj2.add_attribute('domain', value="google.fr")
+            o1 = self.user_misp_connector.add_object(first, obj1, pythonify=True)
+            self.assertEqual(o1.attributes[1].value, 'google.lu')
+            o2 = self.user_misp_connector.add_object(first, obj2, pythonify=True)
+            self.assertEqual(o2.attributes[1].value, 'google.fr')
+            obj2.attributes[1].value = 'google.lu'
+            r = self.user_misp_connector.update_object(obj2, o2.uuid, break_on_duplicate=True)
+            self.assertTrue("Duplicate object found" in r['errors'][1]['errors'], r)
+
+            # Test break on duplicate with breakOnDuplicate key in object for update_object
+            obj2.breakOnDuplicate = True
+            r = self.user_misp_connector.update_object(obj2, o2.uuid)
+            self.assertTrue("Duplicate object found" in r['errors'][1]['errors'], r)
+
             # Test refs
             r = self.user_misp_connector.add_object_reference(fo.ObjectReference[0])
             self.assertEqual(r.object_uuid, fo.uuid, r.to_json())