diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index ae24fca6f5..3bd6226922 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -21,7 +21,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.11', '3.12']
+        python-version: ['3.11', '3.12', '3.13']
         numpy-version: ['1.25', '1.26', '2.0']
         dependency-set: ["minimal", "optional"]
 
diff --git a/pyproject.toml b/pyproject.toml
index 3dc46a0f9c..f6a2819316 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -47,6 +47,7 @@ classifiers = [
     'Programming Language :: Python :: 3',
     'Programming Language :: Python :: 3.11',
     'Programming Language :: Python :: 3.12',
+    'Programming Language :: Python :: 3.13',
 ]
 license = {text = "MIT License"}
 keywords = ["Python", "compressed", "ndimensional-arrays", "zarr"]
@@ -130,17 +131,17 @@ dependencies = [
 features = ["test", "extra"]
 
 [[tool.hatch.envs.test.matrix]]
-python = ["3.11", "3.12"]
+python = ["3.11", "3.12", "3.13"]
 numpy = ["1.25", "1.26", "2.0"]
 version = ["minimal"]
 
 [[tool.hatch.envs.test.matrix]]
-python = ["3.11", "3.12"]
+python = ["3.11", "3.12", "3.13"]
 numpy = ["1.25", "1.26", "2.0"]
 features = ["optional"]
 
 [[tool.hatch.envs.test.matrix]]
-python = ["3.11", "3.12"]
+python = ["3.11", "3.12", "3.13"]
 numpy = ["1.25", "1.26", "2.0"]
 features = ["gpu"]
 
@@ -161,7 +162,7 @@ dependencies = [
 features = ["test", "extra", "gpu"]
 
 [[tool.hatch.envs.gputest.matrix]]
-python = ["3.11", "3.12"]
+python = ["3.11", "3.12", "3.13"]
 numpy = ["1.25", "1.26", "2.0"]
 version = ["minimal"]