diff --git a/es_search.py b/es_search.py
index 9e20505..eae6078 100644
--- a/es_search.py
+++ b/es_search.py
@@ -22,14 +22,14 @@ class ESSearch(PyOperator):
         password (`str=None`): user password to connect ElasticSearch client, defaults to None
         ca_certs (`str=None`): path to CA certificate, defaults to None
     """
-    def __init__(self, host: str, port: int, index_name: str, user: str = None, password: str = None, ca_certs: str = None):
+    def __init__(self, index_name: str, **connection_kwargs):
         super().__init__()
         self.index_name = index_name
+        if 'port' in connection_kwargs:
+            assert 'host' in connection_kwargs, 'Missing port in connection kwargs but given port only.'
+            connection_kwargs['hosts'] = [f'https://{host}:{port}']
         try:
-            self.client = Elasticsearch(
-                f'https://{host}:{port}',
-                ca_certs=ca_certs,
-                basic_auth=(user, password))
+            self.client = Elasticsearch(**connection_kwargs)
             logger.info('Successfully connected to ElasticSearch client.')
         except Exception as e:
             logger.error('Failed to connect ElasticSearch client:\n', e)