diff --git a/src/zeroconf/__init__.py b/src/zeroconf/__init__.py
@@ -1,3 +1,8 @@
+"""A pure python implementation of multicast DNS service discovery.
+
+Licensed under LGPL-2.1-or-later; see COPYING for details.
+"""
+
 from __future__ import annotations
 
 from ._cache import DNSCache  # noqa # import needed for backwards compat

diff --git a/src/zeroconf/_cache.py b/src/zeroconf/_cache.py
@@ -1,3 +1,8 @@
+"""A pure python implementation of multicast DNS service discovery.
+
+Licensed under LGPL-2.1-or-later; see COPYING for details.
+"""
+
 from __future__ import annotations
 
 from collections.abc import Iterable

diff --git a/src/zeroconf/_core.py b/src/zeroconf/_core.py
@@ -1,3 +1,8 @@
+"""A pure python implementation of multicast DNS service discovery.
+
+Licensed under LGPL-2.1-or-later; see COPYING for details.
+"""
+
 from __future__ import annotations
 
 import asyncio

diff --git a/src/zeroconf/_dns.py b/src/zeroconf/_dns.py
@@ -1,3 +1,8 @@
+"""A pure python implementation of multicast DNS service discovery.
+
+Licensed under LGPL-2.1-or-later; see COPYING for details.
+"""
+
 from __future__ import annotations
 
 import enum

diff --git a/src/zeroconf/_engine.py b/src/zeroconf/_engine.py
@@ -1,3 +1,8 @@
+"""A pure python implementation of multicast DNS service discovery.
+
+Licensed under LGPL-2.1-or-later; see COPYING for details.
+"""
+
 from __future__ import annotations
 
 import asyncio

diff --git a/src/zeroconf/_exceptions.py b/src/zeroconf/_exceptions.py
@@ -1,3 +1,8 @@
+"""A pure python implementation of multicast DNS service discovery.
+
+Licensed under LGPL-2.1-or-later; see COPYING for details.
+"""
+
 from __future__ import annotations
 
 

diff --git a/src/zeroconf/_handlers/__init__.py b/src/zeroconf/_handlers/__init__.py
@@ -1 +1,6 @@
+"""A pure python implementation of multicast DNS service discovery.
+
+Licensed under LGPL-2.1-or-later; see COPYING for details.
+"""
+
 from __future__ import annotations
diff --git a/src/zeroconf/_handlers/answers.py b/src/zeroconf/_handlers/answers.py
@@ -1,3 +1,8 @@
+"""A pure python implementation of multicast DNS service discovery.
+
+Licensed under LGPL-2.1-or-later; see COPYING for details.
+"""
+
 from __future__ import annotations
 
 from operator import attrgetter

diff --git a/src/zeroconf/_handlers/multicast_outgoing_queue.py b/src/zeroconf/_handlers/multicast_outgoing_queue.py
@@ -1,3 +1,8 @@
+"""A pure python implementation of multicast DNS service discovery.
+
+Licensed under LGPL-2.1-or-later; see COPYING for details.
+"""
+
 from __future__ import annotations
 
 import random

diff --git a/src/zeroconf/_handlers/query_handler.py b/src/zeroconf/_handlers/query_handler.py
@@ -1,3 +1,8 @@
+"""A pure python implementation of multicast DNS service discovery.
+
+Licensed under LGPL-2.1-or-later; see COPYING for details.
+"""
+
 from __future__ import annotations
 
 from typing import TYPE_CHECKING, cast

diff --git a/src/zeroconf/_handlers/record_manager.py b/src/zeroconf/_handlers/record_manager.py
@@ -1,3 +1,8 @@
+"""A pure python implementation of multicast DNS service discovery.
+
+Licensed under LGPL-2.1-or-later; see COPYING for details.
+"""
+
 from __future__ import annotations
 
 from typing import TYPE_CHECKING, cast

diff --git a/src/zeroconf/_history.py b/src/zeroconf/_history.py
@@ -1,3 +1,8 @@
+"""A pure python implementation of multicast DNS service discovery.
+
+Licensed under LGPL-2.1-or-later; see COPYING for details.
+"""
+
 from __future__ import annotations
 
 from ._dns import DNSQuestion, DNSRecord

diff --git a/src/zeroconf/_listener.py b/src/zeroconf/_listener.py
@@ -1,3 +1,8 @@
+"""A pure python implementation of multicast DNS service discovery.
+
+Licensed under LGPL-2.1-or-later; see COPYING for details.
+"""
+
 from __future__ import annotations
 
 import asyncio

diff --git a/src/zeroconf/_logger.py b/src/zeroconf/_logger.py
@@ -1,3 +1,8 @@
+"""A pure python implementation of multicast DNS service discovery.
+
+Licensed under LGPL-2.1-or-later; see COPYING for details.
+"""
+
 from __future__ import annotations
 
 import logging

diff --git a/src/zeroconf/_protocol/__init__.py b/src/zeroconf/_protocol/__init__.py
@@ -1 +1,6 @@
+"""A pure python implementation of multicast DNS service discovery.
+
+Licensed under LGPL-2.1-or-later; see COPYING for details.
+"""
+
 from __future__ import annotations
diff --git a/src/zeroconf/_protocol/incoming.py b/src/zeroconf/_protocol/incoming.py
@@ -1,3 +1,8 @@
+"""A pure python implementation of multicast DNS service discovery.
+
+Licensed under LGPL-2.1-or-later; see COPYING for details.
+"""
+
 from __future__ import annotations
 
 import struct

diff --git a/src/zeroconf/_protocol/outgoing.py b/src/zeroconf/_protocol/outgoing.py
@@ -1,3 +1,8 @@
+"""A pure python implementation of multicast DNS service discovery.
+
+Licensed under LGPL-2.1-or-later; see COPYING for details.
+"""
+
 from __future__ import annotations
 
 import enum

diff --git a/src/zeroconf/_record_update.py b/src/zeroconf/_record_update.py
@@ -1,3 +1,8 @@
+"""A pure python implementation of multicast DNS service discovery.
+
+Licensed under LGPL-2.1-or-later; see COPYING for details.
+"""
+
 from __future__ import annotations
 
 from ._dns import DNSRecord

diff --git a/src/zeroconf/_services/__init__.py b/src/zeroconf/_services/__init__.py
@@ -1,3 +1,8 @@
+"""A pure python implementation of multicast DNS service discovery.
+
+Licensed under LGPL-2.1-or-later; see COPYING for details.
+"""
+
 from __future__ import annotations
 
 import enum

diff --git a/src/zeroconf/_services/browser.py b/src/zeroconf/_services/browser.py
@@ -1,3 +1,8 @@
+"""A pure python implementation of multicast DNS service discovery.
+
+Licensed under LGPL-2.1-or-later; see COPYING for details.
+"""
+
 from __future__ import annotations
 
 import asyncio

diff --git a/src/zeroconf/_services/info.py b/src/zeroconf/_services/info.py
@@ -1,3 +1,8 @@
+"""A pure python implementation of multicast DNS service discovery.
+
+Licensed under LGPL-2.1-or-later; see COPYING for details.
+"""
+
 from __future__ import annotations
 
 import asyncio

diff --git a/src/zeroconf/_services/registry.py b/src/zeroconf/_services/registry.py
@@ -1,3 +1,8 @@
+"""A pure python implementation of multicast DNS service discovery.
+
+Licensed under LGPL-2.1-or-later; see COPYING for details.
+"""
+
 from __future__ import annotations
 
 from .._exceptions import ServiceNameAlreadyRegistered

diff --git a/src/zeroconf/_services/types.py b/src/zeroconf/_services/types.py
@@ -1,3 +1,8 @@
+"""A pure python implementation of multicast DNS service discovery.
+
+Licensed under LGPL-2.1-or-later; see COPYING for details.
+"""
+
 from __future__ import annotations
 
 import time

diff --git a/src/zeroconf/_transport.py b/src/zeroconf/_transport.py
@@ -1,3 +1,8 @@
+"""A pure python implementation of multicast DNS service discovery.
+
+Licensed under LGPL-2.1-or-later; see COPYING for details.
+"""
+
 from __future__ import annotations
 
 import asyncio

diff --git a/src/zeroconf/_updates.py b/src/zeroconf/_updates.py
@@ -1,3 +1,8 @@
+"""A pure python implementation of multicast DNS service discovery.
+
+Licensed under LGPL-2.1-or-later; see COPYING for details.
+"""
+
 from __future__ import annotations
 
 from typing import TYPE_CHECKING

diff --git a/src/zeroconf/_utils/__init__.py b/src/zeroconf/_utils/__init__.py
@@ -1 +1,6 @@
+"""A pure python implementation of multicast DNS service discovery.
+
+Licensed under LGPL-2.1-or-later; see COPYING for details.
+"""
+
 from __future__ import annotations
diff --git a/src/zeroconf/_utils/asyncio.py b/src/zeroconf/_utils/asyncio.py
@@ -1,3 +1,8 @@
+"""A pure python implementation of multicast DNS service discovery.
+
+Licensed under LGPL-2.1-or-later; see COPYING for details.
+"""
+
 from __future__ import annotations
 
 import asyncio

diff --git a/src/zeroconf/_utils/ipaddress.py b/src/zeroconf/_utils/ipaddress.py
@@ -1,3 +1,8 @@
+"""A pure python implementation of multicast DNS service discovery.
+
+Licensed under LGPL-2.1-or-later; see COPYING for details.
+"""
+
 from __future__ import annotations
 
 from functools import lru_cache

diff --git a/src/zeroconf/_utils/name.py b/src/zeroconf/_utils/name.py
@@ -1,3 +1,8 @@
+"""A pure python implementation of multicast DNS service discovery.
+
+Licensed under LGPL-2.1-or-later; see COPYING for details.
+"""
+
 from __future__ import annotations
 
 from functools import lru_cache

diff --git a/src/zeroconf/_utils/net.py b/src/zeroconf/_utils/net.py
@@ -1,3 +1,8 @@
+"""A pure python implementation of multicast DNS service discovery.
+
+Licensed under LGPL-2.1-or-later; see COPYING for details.
+"""
+
 from __future__ import annotations
 
 import enum

diff --git a/src/zeroconf/_utils/time.py b/src/zeroconf/_utils/time.py
@@ -1,3 +1,8 @@
+"""A pure python implementation of multicast DNS service discovery.
+
+Licensed under LGPL-2.1-or-later; see COPYING for details.
+"""
+
 from __future__ import annotations
 
 import time

diff --git a/src/zeroconf/asyncio.py b/src/zeroconf/asyncio.py
@@ -1,3 +1,8 @@
+"""A pure python implementation of multicast DNS service discovery.
+
+Licensed under LGPL-2.1-or-later; see COPYING for details.
+"""
+
 from __future__ import annotations
 
 import asyncio

diff --git a/src/zeroconf/const.py b/src/zeroconf/const.py
@@ -1,3 +1,8 @@
+"""A pure python implementation of multicast DNS service discovery.
+
+Licensed under LGPL-2.1-or-later; see COPYING for details.
+"""
+
 from __future__ import annotations
 
 import re

diff --git a/tests/__init__.py b/tests/__init__.py
@@ -1,3 +1,8 @@
+"""A pure python implementation of multicast DNS service discovery.
+
+Licensed under LGPL-2.1-or-later; see COPYING for details.
+"""
+
 from __future__ import annotations
 
 import asyncio

diff --git a/tests/services/__init__.py b/tests/services/__init__.py
@@ -1 +1,6 @@
+"""A pure python implementation of multicast DNS service discovery.
+
+Licensed under LGPL-2.1-or-later; see COPYING for details.
+"""
+
 from __future__ import annotations
diff --git a/tests/utils/__init__.py b/tests/utils/__init__.py
@@ -1 +1,6 @@
+"""A pure python implementation of multicast DNS service discovery.
+
+Licensed under LGPL-2.1-or-later; see COPYING for details.
+"""
+
 from __future__ import annotations