diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9d350a1..80e20bb 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -47,23 +47,28 @@ jobs:
                       channel-priority: "strict"
                       envfile: ".github/environment-ci.yml"
 
+                    - os: ubuntu-latest
+                      python-version: "3.12"
+                      channel-priority: "strict"
+                      envfile: ".github/environment-ci.yml"
+
                     - os: macos-latest
-                      python-version: "3.11"
+                      python-version: "3.12"
                       channel-priority: "strict"
                       envfile: ".github/environment-ci.yml"
 
                     - os: windows-latest
-                      python-version: "3.11"
+                      python-version: "3.12"
                       channel-priority: "strict"
                       envfile: ".github/environment-ci.yml"
 
         steps:
-        - uses: actions/checkout@v3
+        - uses: actions/checkout@v4
           with:
             submodules: true
 
         - name: Cache conda
-          uses: actions/cache@v3
+          uses: actions/cache@v4
           env:
             # Increase this value to reset cache if etc/example-environment.yml has not changed
             CACHE_NUMBER: 0
@@ -72,7 +77,7 @@ jobs:
             key: ${{ runner.os }}-${{ matrix.python-version }}-conda-${{ env.CACHE_NUMBER }}-${{ hashFiles( matrix.envfile ) }}
 
         - name: Install Conda environment
-          uses: conda-incubator/setup-miniconda@v2
+          uses: conda-incubator/setup-miniconda@v3
           with:
             auto-update-conda: true
             python-version: ${{ matrix.python-version }}
diff --git a/.github/workflows/lint_python.yml b/.github/workflows/lint_python.yml
index d84e06f..eca30c6 100644
--- a/.github/workflows/lint_python.yml
+++ b/.github/workflows/lint_python.yml
@@ -13,18 +13,18 @@ jobs:
             channel-priority: "flexible"
             envfile: ".github/environment-lint.yml"
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0
     - name: Cache conda
-      uses: actions/cache@v3
+      uses: actions/cache@v4
       env:
         CACHE_NUMBER: 0
       with:
         path: ~/conda_pkgs_dir
         key: ${{ runner.os }}-${{ matrix.python-version }}-conda-${{ env.CACHE_NUMBER }}-${{ hashFiles( matrix.envfile ) }}
     - name: Install conda environmnent
-      uses: conda-incubator/setup-miniconda@v2
+      uses: conda-incubator/setup-miniconda@v3
       with: 
         auto-update-conda: false
         python-version: ${{ matrix.python-version }}
diff --git a/docs/conf.py b/docs/conf.py
index 89a853e..9b24777 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 #
 # pescador documentation build configuration file, created by
 # sphinx-quickstart on Fri Apr  3 10:03:34 2015.
@@ -83,19 +82,14 @@
 master_doc = 'index'
 
 # General information about the project.
-project = u'pescador'
-authors = u'Pescador development team'
-copyright = u'2016, {}'.format(authors)
+project = 'pescador'
+authors = 'Pescador development team'
+copyright = f'2016, {authors}'
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
 # built documents.
-import six
-
-if six.PY3:
-    from unittest.mock import MagicMock as Mock
-else:
-    from mock import Mock
+from unittest.mock import MagicMock as Mock
 
 MOCK_MODULES = ['numpy', 'scipy',
                 'joblib.parallel', 'joblib._parallel_backends', 'joblib',
@@ -261,7 +255,7 @@
 # (source start file, target name, title,
 #  author, documentclass [howto, manual, or own class]).
 latex_documents = [
-  ('index', 'pescador.tex', u'pescador Documentation',
+  ('index', 'pescador.tex', 'pescador Documentation',
    authors),
 ]
 
@@ -291,7 +285,7 @@
 # One entry per manual page. List of tuples
 # (source start file, name, description, authors, manual section).
 man_pages = [
-    ('index', 'pescador', u'pescador Documentation',
+    ('index', 'pescador', 'pescador Documentation',
      [authors], 1)
 ]
 
@@ -305,7 +299,7 @@
 # (source start file, target name, title, author,
 #  dir menu entry, description, category)
 texinfo_documents = [
-    ('index', 'pescador', u'pescador Documentation',
+    ('index', 'pescador', 'pescador Documentation',
      authors, 'pescador', 'One line description of project.',
      'Miscellaneous'),
 ]
diff --git a/docs/requirements.txt b/docs/requirements.txt
index b7c7333..21cd3b4 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,6 +1,5 @@
 matplotlib
 numpydoc>=0.6
-six
 sphinx
 sphinx-gallery
 sphinx_rtd_theme
diff --git a/examples/frameworks/keras_example.py b/examples/frameworks/keras_example.py
index 619440f..cb90503 100644
--- a/examples/frameworks/keras_example.py
+++ b/examples/frameworks/keras_example.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 """
 ===============
 A Keras Example
@@ -14,7 +13,6 @@
 # Setup and Definitions
 ##############################################
 
-from __future__ import print_function
 import datetime
 import keras
 from keras.datasets import mnist
@@ -204,7 +202,7 @@ def additive_noise(stream, key='X', scale=1e-1):
 
 model = build_model(input_shape)
 try:
-    print("Start time: {}".format(datetime.datetime.now()))
+    print(f"Start time: {datetime.datetime.now()}")
     model.fit_generator(
         pescador.tuples(batches, 'X', 'y'),
         steps_per_epoch=steps_per_epoch,
@@ -214,7 +212,7 @@ def additive_noise(stream, key='X', scale=1e-1):
 except KeyboardInterrupt:
     print("Stopping early")
 finally:
-    print("Finished: {}".format(datetime.datetime.now()))
+    print(f"Finished: {datetime.datetime.now()}")
     scores = model.evaluate(X_test, Y_test, verbose=0)
     for val, name in zip(scores, model.metrics_names):
-        print('Test {}: {:0.4f}'.format(name, val))
+        print(f'Test {name}: {val:0.4f}')
diff --git a/examples/mux/chain_example.py b/examples/mux/chain_example.py
index 085f345..3f917a9 100644
--- a/examples/mux/chain_example.py
+++ b/examples/mux/chain_example.py
@@ -1,4 +1,3 @@
-#! -*- coding: utf-8 -*-
 """
 =====================================
 Using ChainMux for repeatable streams
diff --git a/examples/mux/epoch.py b/examples/mux/epoch.py
index 9cdf444..4948f43 100644
--- a/examples/mux/epoch.py
+++ b/examples/mux/epoch.py
@@ -1,4 +1,3 @@
-#! -*- coding: utf-8 -*-
 """
 Using cycle mode to create data epochs
 ======================================
diff --git a/examples/mux/mux_files_example.py b/examples/mux/mux_files_example.py
index 5727c57..e690aaf 100644
--- a/examples/mux/mux_files_example.py
+++ b/examples/mux/mux_files_example.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 """
 =================================
 Muxing Multiple Datasets Together
diff --git a/examples/mux/shuffle.py b/examples/mux/shuffle.py
index ca0d52c..abf3a5d 100644
--- a/examples/mux/shuffle.py
+++ b/examples/mux/shuffle.py
@@ -1,4 +1,3 @@
-#! -*- coding: utf-8 -*-
 """
 Hierarchical sampling with ShuffledMux
 ======================================
@@ -26,7 +25,6 @@
 # Code source: Brian McFee
 # License: BSD 3 Clause
 
-from __future__ import print_function
 import pescador
 
 #####################
diff --git a/examples/zmq_example.py b/examples/zmq_example.py
index 7181bd8..2ead69c 100644
--- a/examples/zmq_example.py
+++ b/examples/zmq_example.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 """
 ==================
 Parallel streaming
diff --git a/pescador/core.py b/pescador/core.py
index 7d56b74..a88e127 100644
--- a/pescador/core.py
+++ b/pescador/core.py
@@ -9,7 +9,7 @@
 from .exceptions import PescadorError
 
 
-class Streamer(object):
+class Streamer:
     """A wrapper class for recycling iterables and generator functions, i.e.
     streamers.
 
@@ -259,8 +259,7 @@ def __call__(self, max_iter=None, cycle=False):
         else:
             gen = self.iterate(max_iter=max_iter)
 
-        for obj in gen:
-            yield obj
+        yield from gen
 
     def __iter__(self):
         """Wrap the iterator interface"""
diff --git a/pescador/exceptions.py b/pescador/exceptions.py
index 0e9b7da..a747c7c 100644
--- a/pescador/exceptions.py
+++ b/pescador/exceptions.py
@@ -1,5 +1,4 @@
 #!/usr/bin/env python
-# -*- encoding: utf-8 -*-
 """Exception classes for pescador"""
 
 
diff --git a/pescador/mux.py b/pescador/mux.py
index 496f01c..ec6fd0a 100644
--- a/pescador/mux.py
+++ b/pescador/mux.py
@@ -1,5 +1,4 @@
 #!/usr/bin/env python
-# -*- encoding: utf-8 -*-
 """\
 Defines the interface and several varieties of *mux*. A *mux* is
 a `Streamer` which wraps N other `Streamer` objects, and at every step yields a
@@ -346,7 +345,7 @@ def __init__(
         self.rate = rate
         self.prune_empty_streams = prune_empty_streams
 
-        super(StochasticMux, self).__init__(streamers, random_state=random_state)
+        super().__init__(streamers, random_state=random_state)
 
         if not self.n_streams:
             raise PescadorError("Cannot mux an empty collection")
@@ -565,7 +564,7 @@ def __init__(self, streamers, weights=None, random_state=None):
             If None, the random number generator is the RandomState instance
             used by np.random.
         """
-        super(ShuffledMux, self).__init__(streamers, random_state=random_state)
+        super().__init__(streamers, random_state=random_state)
 
         if not self.n_streams:
             raise PescadorError("Cannot mux an empty collection")
@@ -711,7 +710,7 @@ def __init__(self, streamers, mode="exhaustive", random_state=None):
             used by `np.random.`
         """
         self.mode = mode
-        super(RoundRobinMux, self).__init__(streamers, random_state=random_state)
+        super().__init__(streamers, random_state=random_state)
 
         if not self.n_streams:
             raise PescadorError("Cannot mux an empty collection")
@@ -886,7 +885,7 @@ def __init__(self, streamers, mode="exhaustive", random_state=None):
         # if inspect.isgeneratorfunction(streamers):
         #     streamers = core.Streamer(streamers)
 
-        super(ChainMux, self).__init__(streamers, random_state=random_state)
+        super().__init__(streamers, random_state=random_state)
 
         if mode not in ["exhaustive", "cycle"]:
             raise PescadorError(f"Invalid ChainMux mode '{mode}'")
diff --git a/pescador/util.py b/pescador/util.py
index 9ad94cf..58c77ab 100644
--- a/pescador/util.py
+++ b/pescador/util.py
@@ -1,5 +1,4 @@
 #!/usr/bin/env python
-# -*- encoding: utf-8 -*-
 """Deprecation utilities"""
 
 import inspect
@@ -11,7 +10,7 @@
 from .exceptions import PescadorError
 
 
-class Deprecated(object):
+class Deprecated:
     """A dummy class to catch usage of deprecated variable names"""
 
     def __repr__(self):
diff --git a/pescador/version.py b/pescador/version.py
index 070d9c5..5cf90be 100644
--- a/pescador/version.py
+++ b/pescador/version.py
@@ -1,5 +1,4 @@
 #!/usr/bin/env python
-# -*- coding: utf-8 -*-
 """Version info"""
 
 short_version = "3.0"
diff --git a/setup.cfg b/setup.cfg
index cc2aa0e..74661f9 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -43,6 +43,7 @@ classifiers =
     Programming Language :: Python :: 3.9
     Programming Language :: Python :: 3.10
     Programming Language :: Python :: 3.11
+    Programming Language :: Python :: 3.12
 
 [options]
 packages = find:
diff --git a/tests/test_core.py b/tests/test_core.py
index 90e51e9..15d9f86 100644
--- a/tests/test_core.py
+++ b/tests/test_core.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 '''Test the streamer object for reusable iterators'''
-from __future__ import print_function
 import copy
 import pytest
 
@@ -278,8 +277,7 @@ def test_decorator():
 
     @pescador.streamable
     def my_generator(n):
-        for i in range(n):
-            yield i
+        yield from range(n)
 
     s = my_generator(5)
     assert isinstance(s, pescador.Streamer)
diff --git a/tests/test_mux.py b/tests/test_mux.py
index 0060c4c..2ab0d39 100644
--- a/tests/test_mux.py
+++ b/tests/test_mux.py
@@ -1,5 +1,4 @@
 # This makes '/' do in python2 what you expect in python3.
-from __future__ import division
 
 import pytest
 
@@ -17,8 +16,7 @@
 
 def _cycle(values):
     while True:
-        for v in values:
-            yield v
+        yield from values
 
 
 def _choice(vals, seed=11111):