diff --git a/.github/workflows/wheels.yml b/.github/workflows/wheels.yml
index 57659d8..445b1c3 100644
--- a/.github/workflows/wheels.yml
+++ b/.github/workflows/wheels.yml
@@ -20,7 +20,7 @@ jobs:
       matrix:
         os:
           - "ubuntu-22.04"
-          - "macos-12"
+          - "macos-13"
           - "macos-14"
           - "windows-latest"
     steps:
@@ -28,7 +28,7 @@ jobs:
         with:
           submodules: true
           fetch-depth: 0
-      - uses: pypa/cibuildwheel@v2.23.2
+      - uses: pypa/cibuildwheel@v3.4.0
       - uses: actions/upload-artifact@v4
         with:
           name: binary-${{ matrix.os }}
diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index c53cbeb..85823c4 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -4,9 +4,11 @@ submodules:
   include: all
 
 build:
-  os: ubuntu-20.04
+  os: ubuntu-22.04
   apt_packages:
     - fonts-liberation
+    - cmake
+    - doxygen
   tools:
     python: "3.11"
 
diff --git a/docs/conf.py b/docs/conf.py
index 9b3da42..e82ef87 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -1,13 +1,13 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 import subprocess
+from importlib.metadata import PackageNotFoundError, version
 
 import sphinx_material
-from pkg_resources import DistributionNotFound, get_distribution
 
 try:
-    __version__ = get_distribution("celerite2").version
-except DistributionNotFound:
+    __version__ = version("celerite2")
+except PackageNotFoundError:
     __version__ = "dev"
 
 
diff --git a/python/celerite2/__init__.py b/python/celerite2/__init__.py
index 481b095..dea1341 100644
--- a/python/celerite2/__init__.py
+++ b/python/celerite2/__init__.py
@@ -11,9 +11,7 @@
 __email__ = "foreman.mackey@gmail.com"
 __license__ = "MIT"
 __description__ = "Fast and scalable Gaussian Processes in 1D"
-__bibtex__ = (
-    __citation__
-) = r"""
+__bibtex__ = __citation__ = r"""
 @article{celerite1,
    author = {{Foreman-Mackey}, D. and {Agol}, E. and {Ambikasaran}, S. and
              {Angus}, R.},