diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4ac52c7e..88d158c7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -24,7 +24,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ['3.12', '3.13', '3.14']
+        python-version: ['3.12', '3.13', '3.14', '3.15']
         platform: [ubuntu-latest, windows-latest]
 
     runs-on: ${{ matrix.platform }}
diff --git a/newsfragments/+python-315.change.md b/newsfragments/+python-315.change.md
new file mode 100644
index 00000000..f20b6a57
--- /dev/null
+++ b/newsfragments/+python-315.change.md
@@ -0,0 +1 @@
+Add support for Python 3.15.
diff --git a/pyproject.toml b/pyproject.toml
index e508b3d6..b801c600 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -28,6 +28,7 @@ classifiers = [
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
     "Programming Language :: Python :: 3.14",
+    "Programming Language :: Python :: 3.15",
 ]
 dynamic = [
     "version",
@@ -360,7 +361,7 @@ ignore_names = [
 [tool.pyproject-fmt]
 indent = 4
 keep_full_version = true
-max_supported_python = "3.14"
+max_supported_python = "3.15"
 
 [tool.mypy]
 files = [ "." ]