diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index 3b6092d..81c66b2 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -29,7 +29,7 @@ jobs:
     timeout-minutes: 5
     strategy:
       matrix:
-        python-version: ["3.8", "3.12"]
+        python-version: ["3.8", "3.13"]
       fail-fast: false
     steps:
       - uses: actions/checkout@v4
@@ -62,7 +62,7 @@ jobs:
     strategy:
       matrix:
         os: ["ubuntu-latest", "macos-latest", "windows-latest"]
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
       fail-fast: false
     steps:
       - uses: actions/checkout@v4
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8fde2a2..85e1201 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,9 @@ Bugfixes
   which only exists on Python 3.13+ when using `typing.TypeVar`.
 * Reduce false positives from Y052 in relation to enum subclasses.
 
+Other changes
+* Declare support for Python 3.13
+
 ## 24.4.1
 
 New error codes:
diff --git a/pyproject.toml b/pyproject.toml
index a82db07..fc0ad05 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -43,6 +43,7 @@ classifiers = [
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
     "Topic :: Software Development :: Libraries :: Python Modules",
     "Topic :: Software Development :: Quality Assurance",
 ]