diff --git a/sqlakeyset/serial/serial.py b/sqlakeyset/serial/serial.py
index 2b708f5..0b751e2 100644
--- a/sqlakeyset/serial/serial.py
+++ b/sqlakeyset/serial/serial.py
@@ -3,6 +3,7 @@ from __future__ import unicode_literals
 import decimal
 import datetime
 import base64
+import uuid
 import dateutil.parser
 
 from .compat import csvreader, csvwriter, sio, text_type, binary_type
@@ -19,6 +20,7 @@ DECIMAL = 'n'
 DATE = 'd'
 DATETIME = 'dt'
 TIME = 't'
+UUID = 'uuid'
 
 
 class Serial(object):
@@ -79,6 +81,8 @@ class Serial(object):
             c = DATETIME
         elif t == datetime.time:
             c = TIME
+        elif t == uuid.UUID:
+            c = UUID
         else:
             raise NotImplementedError(
                 "don't know how to serialize type of {} ({})".format(x, type(x)))
@@ -115,6 +119,8 @@ class Serial(object):
             v = v.date()
         elif c == DATETIME:
             v = dateutil.parser.parse(v)
+        elif c == UUID:
+            v = uuid.UUID(v)
         else:
             raise ValueError('unrecognized value {}'.format(x))
 

bookmark_ serializer does not support uuid.UUID objects
diff --git a/tests/test_ser.py b/tests/test_ser.py
index f47e165..1b46e9b 100644
--- a/tests/test_ser.py
+++ b/tests/test_ser.py
@@ -1,13 +1,15 @@
 from __future__ import unicode_literals
 
-from sqlakeyset.serial import Serial
-
 import csv
 import io
-from pytest import raises
+import uuid
 import decimal
 import datetime
 import pytz
+
+from pytest import raises
+from sqlakeyset.serial import Serial
+
 utc = pytz.utc
 
 DEFAULTS = dict(
@@ -67,6 +69,8 @@ def test_serial():
     assert s.serialize_value(datetime.datetime(2007, 12, 5, 12, 30, 30, tzinfo=utc)) \
         == 'dt:2007-12-05 12:30:30+00:00'
     assert s.serialize_value(datetime.time(12, 34, 56)) == 't:12:34:56'
+    assert s.serialize_value(uuid.UUID('939d4cc9-830d-4cca-bd74-3ec3d541a9b3')) \
+        == 'uuid:939d4cc9-830d-4cca-bd74-3ec3d541a9b3'
     with raises(NotImplementedError):
         s.serialize_value(csv.reader)
 
@@ -87,6 +91,7 @@ def test_unserial():
     twoway(datetime.date(2007, 12, 5))
     twoway(datetime.datetime(2007, 12, 5, 12, 30, 30, tzinfo=utc))
     twoway(Z('abc'))
+    twoway(uuid.UUID('939d4cc9-830d-4cca-bd74-3ec3d541a9b3'))
 
     with raises(ValueError):
         s.unserialize_value('zzzz:abc')

pip install -e .
parse_log_pytest
requirements.txt
pytest pytest-cov pytest-xdist pytest-sugar mock
apt-get update apt-get install -y gcc
3.6
requirements.txt
pytest --no-header -rA --tb=line --color=no -p no:cacheprovider -W ignore::DeprecationWarning
alabaster==0.7.13
astroid==2.11.7
attrs==22.2.0
autopep8==2.0.4
Babel==2.11.0
certifi==2021.5.30
charset-normalizer==2.0.12
coverage==6.2
dill==0.3.4
distlib==0.3.9
docutils==0.18.1
execnet==1.9.0
filelock==3.4.1
flake8==2.3.0
greenlet==2.0.2
idna==3.10
imagesize==1.4.1
importlib-metadata==4.8.3
importlib-resources==5.4.0
iniconfig==1.1.1
isort==5.10.1
itsdangerous==2.0.1
Jinja2==3.0.3
lazy-object-proxy==1.7.1
MarkupSafe==2.0.1
mccabe==0.7.0
mock==5.2.0
packaging==21.3
pep8==1.7.1
platformdirs==2.4.0
pluggy==1.0.0
psycopg2==2.7.7
py==1.11.0
pycodestyle==2.10.0
pyflakes==3.0.1
Pygments==2.14.0
pylint==2.13.9
PyMySQL==1.0.2
pyparsing==3.1.4
pytest==7.0.1
pytest-cov==4.0.0
pytest-sugar==0.9.6
pytest-xdist==3.0.2
python-dateutil==2.9.0.post0
pytz==2025.2
requests==2.27.1
six==1.17.0
snowballstemmer==2.2.0
Sphinx==5.3.0
sphinxcontrib-applehelp==1.0.2
sphinxcontrib-devhelp==1.0.2
sphinxcontrib-htmlhelp==2.0.0
sphinxcontrib-jsmath==1.0.1
sphinxcontrib-qthelp==1.0.3
sphinxcontrib-serializinghtml==1.1.5
-e git+https://github.com/djrobstep/sqlakeyset.git@3fbd20fa3efe1b9a9a6583dc00f0a4bc89f3bc42#egg=sqlakeyset
SQLAlchemy==1.4.54
sqlbag==0.1.1617247075
termcolor==1.1.0
toml==0.10.2
tomli==1.2.3
tox==3.28.0
typed-ast==1.5.5
typing_extensions==4.1.1
urllib3==1.26.20
virtualenv==20.17.1
wrapt==1.16.0
zipp==3.6.0

name: sqlakeyset
channels:
  - defaults
  - https://repo.anaconda.com/pkgs/main
  - https://repo.anaconda.com/pkgs/r
  - conda-forge
dependencies:
  - _libgcc_mutex=0.1=main
  - _openmp_mutex=5.1=1_gnu
  - ca-certificates=2025.2.25=h06a4308_0
  - certifi=2021.5.30=py36h06a4308_0
  - ld_impl_linux-64=2.40=h12ee557_0
  - libffi=3.3=he6710b0_2
  - libgcc-ng=11.2.0=h1234567_1
  - libgomp=11.2.0=h1234567_1
  - libstdcxx-ng=11.2.0=h1234567_1
  - ncurses=6.4=h6a678d5_0
  - openssl=1.1.1w=h7f8727e_0
  - pip=21.2.2=py36h06a4308_0
  - python=3.6.13=h12debd9_1
  - readline=8.2=h5eee18b_0
  - setuptools=58.0.4=py36h06a4308_0
  - sqlite=3.45.3=h5eee18b_0
  - tk=8.6.14=h39e8969_0
  - wheel=0.37.1=pyhd3eb1b0_0
  - xz=5.6.4=h5eee18b_1
  - zlib=1.2.13=h5eee18b_1
  - pip:
      - alabaster==0.7.13
      - astroid==2.11.7
      - attrs==22.2.0
      - autopep8==2.0.4
      - babel==2.11.0
      - charset-normalizer==2.0.12
      - coverage==6.2
      - dill==0.3.4
      - distlib==0.3.9
      - docutils==0.18.1
      - execnet==1.9.0
      - filelock==3.4.1
      - flake8==2.3.0
      - greenlet==2.0.2
      - idna==3.10
      - imagesize==1.4.1
      - importlib-metadata==4.8.3
      - importlib-resources==5.4.0
      - iniconfig==1.1.1
      - isort==5.10.1
      - itsdangerous==2.0.1
      - jinja2==3.0.3
      - lazy-object-proxy==1.7.1
      - markupsafe==2.0.1
      - mccabe==0.7.0
      - mock==5.2.0
      - packaging==21.3
      - pep8==1.7.1
      - platformdirs==2.4.0
      - pluggy==1.0.0
      - psycopg2==2.7.7
      - py==1.11.0
      - pycodestyle==2.10.0
      - pyflakes==3.0.1
      - pygments==2.14.0
      - pylint==2.13.9
      - pymysql==1.0.2
      - pyparsing==3.1.4
      - pytest==7.0.1
      - pytest-cov==4.0.0
      - pytest-sugar==0.9.6
      - pytest-xdist==3.0.2
      - python-dateutil==2.9.0.post0
      - pytz==2025.2
      - requests==2.27.1
      - six==1.17.0
      - snowballstemmer==2.2.0
      - sphinx==5.3.0
      - sphinxcontrib-applehelp==1.0.2
      - sphinxcontrib-devhelp==1.0.2
      - sphinxcontrib-htmlhelp==2.0.0
      - sphinxcontrib-jsmath==1.0.1
      - sphinxcontrib-qthelp==1.0.3
      - sphinxcontrib-serializinghtml==1.1.5
      - sqlalchemy==1.4.54
      - sqlbag==0.1.1617247075
      - termcolor==1.1.0
      - toml==0.10.2
      - tomli==1.2.3
      - tox==3.28.0
      - typed-ast==1.5.5
      - typing-extensions==4.1.1
      - urllib3==1.26.20
      - virtualenv==20.17.1
      - wrapt==1.16.0
      - zipp==3.6.0
prefix: /opt/conda/envs/sqlakeyset

tests/test_ser.py::test_serial tests/test_ser.py::test_unserial
tests/test_ser.py::test_ser
sqlakeyset/serial/serial.py
sqlakeyset/serial/serial.py