diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index c0411d8..047c566 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -15,7 +15,7 @@ jobs:
 
     strategy:
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "pypy3.9", "pypy3.10"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13-dev", "pypy3.9", "pypy3.10"]
 
     steps:
       - uses: "actions/checkout@v3"
diff --git a/docs/source/news.rst b/docs/source/news.rst
index 5201382..2f102b1 100644
--- a/docs/source/news.rst
+++ b/docs/source/news.rst
@@ -1,6 +1,13 @@
 What's New
 ==========
 
+1.16.0
+^^^^^^
+
+Enhancements:
+
+* Added official support for Python 3.13, though 1.15.0 works fine too.
+
 1.15.0
 ^^^^^^
 
diff --git a/eliot/tests/test_json.py b/eliot/tests/test_json.py
index 90b5ecb..2b4e57e 100644
--- a/eliot/tests/test_json.py
+++ b/eliot/tests/test_json.py
@@ -30,7 +30,7 @@ def test_numpy(self):
             np.float64(2.0),
             np.float16(0.5),
             np.bool_(True),
-            np.unicode_("hello"),
+            np.str_("hello"),
             np.byte(12),
             np.short(12),
             np.intc(-13),
diff --git a/setup.py b/setup.py
index 2e9696a..cc56075 100644
--- a/setup.py
+++ b/setup.py
@@ -23,6 +23,7 @@ def read(path):
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
         "Programming Language :: Python :: 3.12",
+        "Programming Language :: Python :: 3.13",
         "Programming Language :: Python :: Implementation :: CPython",
         "Programming Language :: Python :: Implementation :: PyPy",
         "Topic :: System :: Logging",
diff --git a/tox.ini b/tox.ini
index fd08b31..3cca024 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py38-numpy, pypy39, pypy310, py38, py39, py310, py311, py312,
+envlist = py38-numpy, pypy39, pypy310, py38, py39, py310, py311, py312, py313,
           py38-twisted-latest,
           linters3, sphinx
 
@@ -10,6 +10,8 @@ python =
        3.10: py310
        3.11: py311
        3.12: py312
+       3.13: py313
+       3.13-dev: py313
        pypy3.9: pypy39
        pypy3.10: pypy310