diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index c3b0e30..a47412f 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -4,7 +4,7 @@ on:
   push:
   pull_request:
   schedule:
-    - cron: '11 22 2 * *'
+    - cron: "11 22 2 * *"
 
 jobs:
   tox:
@@ -13,6 +13,7 @@ jobs:
       fail-fast: false
       matrix:
         py:
+          - "3.12"
           - "3.11"
           - "3.10"
           - "3.9"
diff --git a/opencage/__init__.py b/opencage/__init__.py
index 078e440..d40fc7c 100644
--- a/opencage/__init__.py
+++ b/opencage/__init__.py
@@ -1,5 +1,6 @@
 """ Base module for OpenCage stuff. """
 
+from .version import __version__
+
 __author__ = "OpenCage GmbH"
 __email__ = 'support@opencagedata.com'
-__version__ = '2.3.1'
diff --git a/opencage/geocoder.py b/opencage/geocoder.py
index 5913f2d..ec6c4cd 100644
--- a/opencage/geocoder.py
+++ b/opencage/geocoder.py
@@ -5,8 +5,10 @@
 import collections
 
 import os
+import sys
 import requests
 import backoff
+from .version import __version__
 
 try:
     import aiohttp
@@ -259,9 +261,9 @@ async def reverse_geocode_async(self, lat, lng, **kwargs):
     def _opencage_request(self, params):
 
         if self.session:
-            response = self.session.get(self.url, params=params)
+            response = self.session.get(self.url, params=params, headers=self._opencage_headers('aiohttp'))
         else:
-            response = requests.get(self.url, params=params) # pylint: disable=missing-timeout
+            response = requests.get(self.url, params=params, headers=self._opencage_headers('requests')) # pylint: disable=missing-timeout
 
         try:
             response_json = response.json()
@@ -290,6 +292,21 @@ def _opencage_request(self, params):
 
         return response_json
 
+    def _opencage_headers(self, client):
+        if client == 'requests':
+            client_version = requests.__version__
+        elif client == 'aiohttp':
+            client_version = aiohttp.__version__
+
+        return {
+            'User-Agent': 'opencage-python/%s Python/%s %s/%s' % (
+                __version__,
+                '.'.join(str(x) for x in sys.version_info[0:3]),
+                client,
+                client_version
+            )
+        }
+
     async def _opencage_async_request(self, params):
         try:
             async with self.session.get(self.url, params=params, ssl=self.sslcontext) as response:
diff --git a/opencage/version.py b/opencage/version.py
new file mode 100644
index 0000000..1c4ddd3
--- /dev/null
+++ b/opencage/version.py
@@ -0,0 +1 @@
+__version__ = '2.3.1'
diff --git a/test/test_headers.py b/test/test_headers.py
new file mode 100644
index 0000000..6bbff19
--- /dev/null
+++ b/test/test_headers.py
@@ -0,0 +1,30 @@
+# encoding: utf-8
+
+from pathlib import Path
+
+import os
+import re
+import httpretty
+
+from httpretty import httprettified
+from opencage.geocoder import OpenCageGeocode
+
+# reduce maximum backoff retry time from 120s to 1s
+os.environ['BACKOFF_MAX_TIME'] = '1'
+
+geocoder = OpenCageGeocode('abcde')
+
+user_agent_format = re.compile(r'^opencage-python/[\d\.]+ Python/[\d\.]+ (requests|aiohttp)/[\d\.]+$')
+
+@httprettified
+def test_sync():
+    httpretty.register_uri(
+        httpretty.GET,
+        geocoder.url,
+        body=Path('test/fixtures/uk_postcode.json').read_text(encoding="utf-8")
+    )
+
+    geocoder.geocode("EC1M 5RF")
+    user_agent = httpretty.last_request().headers['User-Agent']
+
+    assert user_agent_format.match(user_agent) is not None
diff --git a/tox.ini b/tox.ini
index c8124c2..bd9ee7e 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,8 +1,9 @@
 [tox]
-envlist = py37,py38,py39,py310,py311,lint
+envlist = py37,py38,py39,py310,py311,py312,lint
 
 [gh]
 python =
+    3.12 = py312
     3.11 = py311
     3.10 = py310
     3.9 = py39