diff --git a/CHANGELOG.md b/CHANGELOG.md
index db198c0..0a9d03d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## 0.5.1
+
+- Fixed return types for `.sqlalchemy` module
+
 ## 0.5.0
 
 + `sqlalchemy`: add `unbound_fk()`, `bound_fk()`
@@ -17,6 +21,11 @@
 + Add `quart` module with `negotiate()`, `add_rest()`, `add_i18n()`, `WantsContentType`
 + Add `dei` module: it implements a compact and standardized representation for pronouns, inspired by the one in use at PronounDB
 
+## 0.4.1
+
+- Fixed return types for `.sqlalchemy` module.
+- `sqlalchemy.parent_children()` now takes a `lazy` parameter. Backported from 0.5.1.
+
 ## 0.4.0
 
 + `pydantic` is now a hard dependency
@@ -33,6 +42,11 @@
 + Added `addattr()`, `PrefixIdentifier()`, `mod_floor()`, `mod_ceil()`
 + First version to have unit tests! (Coverage is not yet complete)
 
+## 0.3.8
+
+- Fixed return types for `.sqlalchemy` module.
+- `sqlalchemy.parent_children()` now takes a `lazy` parameter. Backported from 0.5.1.
+
 ## 0.3.7
 
 - Fixed a bug in `b64decode()` padding handling which made the function inconsistent and non injective. Now, leading `'A'` is NEVER stripped.
diff --git a/src/suou/__init__.py b/src/suou/__init__.py
index 4c3f2d7..21608a4 100644
--- a/src/suou/__init__.py
+++ b/src/suou/__init__.py
@@ -34,7 +34,7 @@ from .validators import matches
 from .redact import redact_url_password
 from .http import WantsContentType
 
-__version__ = "0.5.0"
+__version__ = "0.5.1"
 
 __all__ = (
     'ConfigOptions', 'ConfigParserConfigSource', 'ConfigSource', 'ConfigValue',
diff --git a/src/suou/sqlalchemy.py b/src/suou/sqlalchemy.py
index 0b4b66b..6be1d8a 100644
--- a/src/suou/sqlalchemy.py
+++ b/src/suou/sqlalchemy.py
@@ -20,9 +20,14 @@ from abc import ABCMeta, abstractmethod
 from functools import wraps
 from typing import Callable, Iterable, Never, TypeVar
 import warnings
+<<<<<<< HEAD
 from sqlalchemy import BigInteger, Boolean, CheckConstraint, Date, Dialect, ForeignKey, LargeBinary, Column, MetaData, SmallInteger, String, create_engine, select, text
 from sqlalchemy.orm import DeclarativeBase, InstrumentedAttribute, Session, declarative_base as _declarative_base, relationship
 from sqlalchemy.types import TypeEngine
+=======
+from sqlalchemy import BigInteger, CheckConstraint, Date, Dialect, ForeignKey, LargeBinary, Column, MetaData, SmallInteger, String, create_engine, select, text
+from sqlalchemy.orm import DeclarativeBase, Relationship, Session, declarative_base as _declarative_base, relationship
+>>>>>>> a66f591 (update changelog, add lazy= to parent_children())
 
 from .snowflake import SnowflakeGen
 from .itertools import kwargs_prefix, makelist
@@ -131,7 +136,7 @@ def bool_column(value: bool = False, nullable: bool = False, **kwargs):
     return Column(Boolean, server_default=def_val, nullable=nullable, **kwargs)
 
 
-def declarative_base(domain_name: str, master_secret: bytes, metadata: dict | None = None, **kwargs) -> DeclarativeBase:
+def declarative_base(domain_name: str, master_secret: bytes, metadata: dict | None = None, **kwargs) -> type[DeclarativeBase]:
     """
     Drop-in replacement for sqlalchemy.orm.declarative_base()
     taking in account requirements for SIQ generation (i.e. domain name).
@@ -204,7 +209,7 @@ def age_pair(*, nullable: bool = False, **ka) -> tuple[Column, Column]:
     return (date_col, acc_col)
 
 
-def parent_children(keyword: str, /, *, lazy: str = 'selectin', **kwargs):
+def parent_children(keyword: str, /, *, lazy='selectin', **kwargs) -> tuple[Incomplete[Relationship], Incomplete[Relationship]]:
     """
     Self-referential one-to-many relationship pair.
     Parent comes first, children come later.