diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 38b8f092..bda30b7d 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -40,6 +40,7 @@ jobs:
       matrix:
         python:
           - "3.11"
+          - "3.12"
 
     steps:
       - uses: actions/checkout@v4
diff --git a/.github/workflows/periodic-ci.yaml b/.github/workflows/periodic-ci.yaml
index bdf64f8e..4392ab27 100644
--- a/.github/workflows/periodic-ci.yaml
+++ b/.github/workflows/periodic-ci.yaml
@@ -18,6 +18,7 @@ jobs:
       matrix:
         python:
           - "3.11"
+          - "3.12"
 
     steps:
       - uses: actions/checkout@v4
diff --git a/changelog.d/20231114_164421_rra_DM_41708.md b/changelog.d/20231114_164421_rra_DM_41708.md
new file mode 100644
index 00000000..ce9c504e
--- /dev/null
+++ b/changelog.d/20231114_164421_rra_DM_41708.md
@@ -0,0 +1,3 @@
+### New features
+
+- Safir now supports Python 3.12.
diff --git a/pyproject.toml b/pyproject.toml
index b343c313..1612c4ef 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,6 +15,7 @@ classifiers = [
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",
     "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
     "Intended Audience :: Developers",
     "Natural Language :: English",
     "Operating System :: POSIX",