diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4a0664a..d88b18d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.9, "3.10", "3.11", "3.12"]
+        python-version: ["3.10", "3.11", "3.12", "3.13"]
     steps:
       - uses: actions/checkout@v2
         with:
@@ -21,7 +21,6 @@ jobs:
       - name: Install dependencies
         run: |
           sudo apt-get install gfortran
-          # JAX isn't yet NumPy 2 compatible.
           pip install --upgrade pip setuptools 'setuptools_scm[toml]' setuptools_scm_git_archive numpy Cython
           python setup.py --version
           LAB_BUILD=1 pip install --no-cache-dir -U -r requirements.txt | cat
diff --git a/lab/types.py b/lab/types.py
index 5c5232b..7c75524 100644
--- a/lab/types.py
+++ b/lab/types.py
@@ -103,6 +103,7 @@ def _jax_version():
             "jaxlib._jax",
             "ArrayImpl",
             condition=lambda: _jax_version() >= (0, 6, 0),
+            faithful=True,
         ),
     ]
 _jax_tracer = ModuleType("jax.core", "Tracer")
diff --git a/lab/util.py b/lab/util.py
index 7622435..a605e38 100644
--- a/lab/util.py
+++ b/lab/util.py
@@ -2,8 +2,7 @@
 
 import numpy as np
 import plum
-import plum.signature
-import plum.type
+from plum._method import MethodList
 
 from . import B
 
@@ -210,8 +209,8 @@ def wrapper(*args, **kw_args):
             # means that an implementation is not available.
             types_after = tuple(type(arg) for arg in args)
             if types_before == types_after:
-                signature = plum.signature.Signature(*types_after)
-                raise plum.NotFoundLookupError(f.__name__, signature, [])
+                signature = plum.Signature(*types_after)
+                raise plum.NotFoundLookupError(f.__name__, signature, MethodList())
 
             # Retry call.
             return getattr(B, f.__name__)(*args, **kw_args)
diff --git a/setup.py b/setup.py
index d45f4fd..8d52a6d 100755
--- a/setup.py
+++ b/setup.py
@@ -112,13 +112,13 @@
 requirements = [
     "numpy>=1.16",
     "scipy>=1.3",
-    "plum-dispatch>=2.6.0",
+    "plum-dispatch>=2.7.1",
     "opt-einsum",
 ]
 
 setup(
     packages=find_packages(exclude=["docs"]),
-    python_requires=">=3.9",
+    python_requires=">=3.10",
     install_requires=requirements,
     cmdclass={"build_ext": build_ext},
     ext_modules=ext_modules,
diff --git a/tests/test_types.py b/tests/test_types.py
index 9f4e12a..8c531b1 100644
--- a/tests/test_types.py
+++ b/tests/test_types.py
@@ -5,13 +5,12 @@
 import tensorflow as tf
 import torch
 from autograd import grad
-from plum import isinstance
-from plum.promotion import _promotion_rule, convert
+from plum import convert, isinstance
+from plum._promotion import _promotion_rule
 
 import lab as B
 
-# noinspection PyUnresolvedReferences
-from .util import autograd_box, check_lazy_shapes
+from .util import autograd_box, check_lazy_shapes  # noqa: F401
 
 
 def test_numeric(check_lazy_shapes):