diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index bdd6f66..c251c44 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -12,7 +12,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-20.04, macOS-10.15, windows-2019]
-        python-version: [3.6, 3.7, 3.8, 3.9, "3.10", 3.11, 3.12.0-rc.2]
+        python-version: [3.6, 3.7, 3.8, 3.9, "3.10", 3.11, 3.12, 3.13]
     steps:
     - uses: actions/checkout@v2
     - name: Set up Python ${{ matrix.python-version }}
diff --git a/pyproject.toml b/pyproject.toml
index 0735955..c82924e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,6 +24,7 @@ classifiers = [
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
     "Topic :: Documentation :: Sphinx",
     "Topic :: Text Processing :: Markup",
     "Topic :: Software Development :: Libraries :: Python Modules",
@@ -41,6 +42,11 @@ pre-commit = {version = ">=2.16.0", python = ">=3.9"}
 pytest = "*"
 pydoctor = ">=22.3.0"
 
+# Workaround from https://github.com/python-poetry/poetry/issues/9293#issuecomment-2048205226
+[[tool.poetry.source]]
+name = "pypi-public"
+url = "https://pypi.org/simple/"
+
 [tool.black]
 line-length = 79
 py36 = true