diff --git a/src/doc/conf.py b/src/doc/conf.py
index 75c38fd379390ce07323b1520e94c10e4f61348e..beb57b0f06c9dc89be62ac0ef571d99d2dd5643b 100644
--- a/src/doc/conf.py
+++ b/src/doc/conf.py
@@ -203,7 +203,7 @@ epub_exclude_files = ['search.html']
 intersphinx_mapping = {
     "python": ("https://docs.python.org/", None),
     "linkahead-mysqlbackend": ("https://docs.linkahead.org/linkahead-mysqlbackend/",
-                            None),
+                               None),
     "linkahead-server": ("https://docs.linkahead.org/linkahead-server/", None),
 }
 
diff --git a/src/linkahead/common/models.py b/src/linkahead/common/models.py
index 4816d220d2c1bc2f89fb45701417fc1c0273a2f3..4815accb85509e479da9dbadeebaee81ca48daaf 100644
--- a/src/linkahead/common/models.py
+++ b/src/linkahead/common/models.py
@@ -49,7 +49,7 @@ from typing import Any, Optional
 from warnings import warn
 
 from linkahead.common.datatype import (BOOLEAN, DATETIME, DOUBLE, INTEGER, TEXT,
-                                    is_list_datatype, is_reference)
+                                       is_list_datatype, is_reference)
 from linkahead.common.state import State
 from linkahead.common.timezone import TimeZone
 from linkahead.common.utils import uuid, xml2str
@@ -58,14 +58,14 @@ from linkahead.configuration import get_config
 from linkahead.connection.connection import get_connection
 from linkahead.connection.encode import MultipartParam, multipart_encode
 from linkahead.exceptions import (AmbiguousEntityError, AuthorizationError,
-                               LinkAheadConnectionError, LinkAheadException,
-                               ConsistencyError, EmptyUniqueQueryError,
-                               EntityDoesNotExistError, EntityError,
-                               EntityHasNoDatatypeError, HTTPURITooLongError,
-                               MismatchingEntitiesError, QueryNotUniqueError,
-                               TransactionError, UniqueNamesError,
-                               UnqualifiedParentsError,
-                               UnqualifiedPropertiesError)
+                                  LinkAheadConnectionError, LinkAheadException,
+                                  ConsistencyError, EmptyUniqueQueryError,
+                                  EntityDoesNotExistError, EntityError,
+                                  EntityHasNoDatatypeError, HTTPURITooLongError,
+                                  MismatchingEntitiesError, QueryNotUniqueError,
+                                  TransactionError, UniqueNamesError,
+                                  UnqualifiedParentsError,
+                                  UnqualifiedPropertiesError)
 from lxml import etree
 
 _ENTITY_URI_SEGMENT = "Entity"