diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index f592fbc..884be43 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -9,9 +9,9 @@ on:
     - # cron (in UTC): minute hour day_of_month month day_of_week
       cron: '00 02 * * SUN'
   push:
-    branches: [ master ]
+    branches: [ master, stable_0.5 ]
   pull_request:
-    branches: [ master ]
+    branches: [ master, stable_0.5 ]
 
 jobs:
 
diff --git a/docs/changes.rst b/docs/changes.rst
index 739074b..4ccc671 100644
--- a/docs/changes.rst
+++ b/docs/changes.rst
@@ -5,9 +5,9 @@ Change log
 ==========
 
 
-syslog2 0.5.0.dev1
-------------------
+syslog2 0.5.0
+-------------
 
-Released: 2022-mm-dd
+Released: 2022-09-05
 
 Initial version
diff --git a/minimum-constraints.txt b/minimum-constraints.txt
index 945c369..1ff42b5 100644
--- a/minimum-constraints.txt
+++ b/minimum-constraints.txt
@@ -76,12 +76,13 @@
 # pip 10.0.0 introduced the --exclude-editable option.
 # Pip 20.2 introduced a new resolver whose backtracking had issues that were resolved only in 21.2.2.
 # pip>=21.0 is needed for the cryptography package on Windows on GitHub Actions.
+# setuptools 49.1.3 or 49.2.0 is needed on py310
 pip==10.0.1; python_version <= '3.5'
 pip==21.2.2; python_version >= '3.6'
 setuptools==39.0.1; python_version <= '3.6'
 setuptools==40.6.0; python_version == '3.7'
 setuptools==41.5.0; python_version >= '3.8' and python_version <= '3.9'
-setuptools==49.0.0; python_version >= '3.10'
+setuptools==49.2.0; python_version >= '3.10'
 wheel==0.30.0; python_version <= '3.6'
 wheel==0.32.0; python_version == '3.7'
 wheel==0.33.5; python_version >= '3.8'
@@ -94,10 +95,8 @@ pytz==2019.1
 
 macos_oslog==0.5.0; sys_platform=='darwin'
 
-pywin32==222; sys_platform == 'win32' and python_version == '2.7'
-pywin32==222; sys_platform == 'win32' and python_version >= '3.5' and python_version <= '3.6'
-pywin32==223; sys_platform == 'win32' and python_version == '3.7'
-pywin32==227; sys_platform == 'win32' and python_version >= '3.8' and python_version != '3.10'
+pywin32==228; sys_platform == 'win32' and python_version <= '3.9'
+pywin32==302; sys_platform == 'win32' and python_version >= '3.10'
 
 
 # Indirect dependencies for installation (must be consistent with requirements.txt, if present)
diff --git a/requirements.txt b/requirements.txt
index 15a52fe..c4f88d9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -21,19 +21,9 @@ pytz>=2019.1
 macos_oslog>=0.5.0; sys_platform=='darwin' and python_version >= '3.5'
 
 # There is no version of pywin32 for py34.
-# Pywin32 version 222 is inconsistent in its 32-bit/64-bit support on py37
-# Pywin32 version 226 needs to be excluded, see issues #1946 and #1975.
-# Issue #2675: Pywin32 version 225+ provides wheel files for py38, but does not
-#   advertise py38 on Pypi. That causes pywin32==225 to fail but pywin32>=225
-#   to work.
-#   Reported to pywin32 as https://github.com/mhammond/pywin32/issues/1448.
-#   Addressed by increasing the minimum version of pywin32 to >=227 on Python >=3.8.
-# TODO: To circumvent https://github.com/pypa/pip/issues/10701, we exclude
-#       py3.10. Remove the circumvention once fixed.
-pywin32>=222,!=226; sys_platform == 'win32' and python_version == '2.7'
-pywin32>=222,!=226; sys_platform == 'win32' and python_version >= '3.5' and python_version <= '3.6'
-pywin32>=223,!=226; sys_platform == 'win32' and python_version == '3.7'
-pywin32>=227; sys_platform == 'win32' and python_version >= '3.8' and python_version != '3.10'
+# Pywin32 version 227 (or so) is needed for using the win32evtlog module.
+pywin32>=228; sys_platform == 'win32' and python_version <= '3.9'
+pywin32>=302; sys_platform == 'win32' and python_version >= '3.10'
 
 
 # Indirect dependencies are not specified in this file.
diff --git a/syslog2/_syslog2.py b/syslog2/_syslog2.py
index 8b15365..0b5a63f 100644
--- a/syslog2/_syslog2.py
+++ b/syslog2/_syslog2.py
@@ -34,19 +34,19 @@
 import pytz
 
 # Determine the current operating system platform
-_system = platform.system()
-if _system == 'Linux':
+_SYSTEM = platform.system()
+if _SYSTEM == 'Linux':
     _PLATFORM = 'linux'
-elif _system == 'Darwin':  # macOS
+elif _SYSTEM == 'Darwin':  # macOS
     if tuple(map(int, platform.mac_ver()[0].split('.'))) >= (10, 12):
         _PLATFORM = 'macos_unified'  # unified logging system
     else:
         _PLATFORM = 'macos_syslog'   # Apple system log
 elif os.name == 'posix':  # Linux and macOS also have posix
     _PLATFORM = 'unix'
-elif _system == 'Windows':
+elif _SYSTEM == 'Windows':
     _PLATFORM = 'windows'
-elif _system.startswith('CYGWIN'):  # e.g. 'CYGWIN_NT-6.1'
+elif _SYSTEM.startswith('CYGWIN'):  # e.g. 'CYGWIN_NT-6.1'
     _PLATFORM = 'cygwin'
 else:
     _PLATFORM = 'other'
diff --git a/syslog2/_version.py b/syslog2/_version.py
index 2eb0ffc..e739cce 100644
--- a/syslog2/_version.py
+++ b/syslog2/_version.py
@@ -23,4 +23,4 @@
 #:
 #: * "M.N.P.dev1": Development level 1 of a not yet released version M.N.P
 #: * "M.N.P": A released version M.N.P
-__version__ = '0.5.0.dev1'
+__version__ = '0.5.0'