diff --git a/.github/workflows/python_ci.yml b/.github/workflows/python_ci.yml
index 2dc70d3..bfb0a63 100644
--- a/.github/workflows/python_ci.yml
+++ b/.github/workflows/python_ci.yml
@@ -22,7 +22,7 @@ jobs:
     runs-on: "windows-2019"
     continue-on-error: ${{ matrix.config.experimental }}
     env:
-      USING_COVERAGE: '3.7,3.8,3.9,3.10,3.11,3.12,3.13.0-alpha.5,pypy-3.7,pypy-3.8,pypy-3.9'
+      USING_COVERAGE: '3.7,3.8,3.9,3.10,3.11,3.12,3.13.0-alpha.6,pypy-3.7,pypy-3.8,pypy-3.9'
 
     strategy:
       fail-fast: False
@@ -34,7 +34,7 @@ jobs:
           - {python-version: "3.10", testenvs: "py310-attrs{21.2,21.4,22.2,23.1,23.2,latest},py310-mypy{0.900,0.910,0.921,0.931,1.0.1,1.2.0,1.4.1,1.6.1,latest},py310-sphinx{4,5,6,7},build", experimental: False}
           - {python-version: "3.11", testenvs: "py311-attrs{21.2,21.4,22.2,23.1,23.2,latest},py311-mypy{0.900,0.910,0.921,0.931,1.0.1,1.2.0,1.4.1,1.6.1,latest},py311-sphinx{4,5,6,7},build", experimental: False}
           - {python-version: "3.12", testenvs: "py312-attrs{21.2,21.4,22.2,23.1,23.2,latest},py312-mypy{0.900,0.910,0.921,0.931,1.0.1,1.2.0,1.4.1,1.6.1,latest},py312-sphinx{4,5,6,7},build", experimental: True}
-          - {python-version: "3.13.0-alpha.5", testenvs: "py313-dev-attrs{21.2,21.4,22.2,23.1,23.2,latest},py313-dev-mypy{0.900,0.910,0.921,0.931,1.0.1,1.2.0,1.4.1,1.6.1,latest},py313-dev-sphinx{4,5,6,7},build", experimental: True}
+          - {python-version: "3.13.0-alpha.6", testenvs: "py313-dev-attrs{21.2,21.4,22.2,23.1,23.2,latest},py313-dev-mypy{0.900,0.910,0.921,0.931,1.0.1,1.2.0,1.4.1,1.6.1,latest},py313-dev-sphinx{4,5,6,7},build", experimental: True}
           - {python-version: "pypy-3.7", testenvs: "pypy37-attrs{21.2,21.4,22.2,23.1,23.2,latest},pypy37-sphinx{4,5},build", experimental: False}
           - {python-version: "pypy-3.8", testenvs: "pypy38-attrs{21.2,21.4,22.2,23.1,23.2,latest},pypy38-sphinx{4,5,6,7},build", experimental: False}
           - {python-version: "pypy-3.9", testenvs: "pypy39-attrs{21.2,21.4,22.2,23.1,23.2,latest},pypy39-sphinx{4,5,6,7},build", experimental: True}
diff --git a/.github/workflows/python_ci_linux.yml b/.github/workflows/python_ci_linux.yml
index b4b0aad..7d169e1 100644
--- a/.github/workflows/python_ci_linux.yml
+++ b/.github/workflows/python_ci_linux.yml
@@ -23,7 +23,7 @@ jobs:
     runs-on: "ubuntu-20.04"
     continue-on-error: ${{ matrix.config.experimental }}
     env:
-      USING_COVERAGE: '3.7,3.8,3.9,3.10,3.11,3.12,3.13.0-alpha.5,pypy-3.7,pypy-3.8,pypy-3.9'
+      USING_COVERAGE: '3.7,3.8,3.9,3.10,3.11,3.12,3.13.0-alpha.6,pypy-3.7,pypy-3.8,pypy-3.9'
 
     strategy:
       fail-fast: False
@@ -35,7 +35,7 @@ jobs:
           - {python-version: "3.10", testenvs: "py310-attrs{21.2,21.4,22.2,23.1,23.2,latest},py310-mypy{0.900,0.910,0.921,0.931,1.0.1,1.2.0,1.4.1,1.6.1,latest},py310-sphinx{4,5,6,7},build", experimental: False}
           - {python-version: "3.11", testenvs: "py311-attrs{21.2,21.4,22.2,23.1,23.2,latest},py311-mypy{0.900,0.910,0.921,0.931,1.0.1,1.2.0,1.4.1,1.6.1,latest},py311-sphinx{4,5,6,7},build", experimental: False}
           - {python-version: "3.12", testenvs: "py312-attrs{21.2,21.4,22.2,23.1,23.2,latest},py312-mypy{0.900,0.910,0.921,0.931,1.0.1,1.2.0,1.4.1,1.6.1,latest},py312-sphinx{4,5,6,7},build", experimental: True}
-          - {python-version: "3.13.0-alpha.5", testenvs: "py313-dev-attrs{21.2,21.4,22.2,23.1,23.2,latest},py313-dev-mypy{0.900,0.910,0.921,0.931,1.0.1,1.2.0,1.4.1,1.6.1,latest},py313-dev-sphinx{4,5,6,7},build", experimental: True}
+          - {python-version: "3.13.0-alpha.6", testenvs: "py313-dev-attrs{21.2,21.4,22.2,23.1,23.2,latest},py313-dev-mypy{0.900,0.910,0.921,0.931,1.0.1,1.2.0,1.4.1,1.6.1,latest},py313-dev-sphinx{4,5,6,7},build", experimental: True}
           - {python-version: "pypy-3.7", testenvs: "pypy37-attrs{21.2,21.4,22.2,23.1,23.2,latest},pypy37-sphinx{4,5},build", experimental: False}
           - {python-version: "pypy-3.8", testenvs: "pypy38-attrs{21.2,21.4,22.2,23.1,23.2,latest},pypy38-sphinx{4,5,6,7},build", experimental: False}
           - {python-version: "pypy-3.9", testenvs: "pypy39-attrs{21.2,21.4,22.2,23.1,23.2,latest},pypy39-sphinx{4,5,6,7},build", experimental: True}
diff --git a/.github/workflows/python_ci_macos.yml b/.github/workflows/python_ci_macos.yml
index f9afd47..8e6ade0 100644
--- a/.github/workflows/python_ci_macos.yml
+++ b/.github/workflows/python_ci_macos.yml
@@ -22,7 +22,7 @@ jobs:
     runs-on: "macos-latest"
     continue-on-error: ${{ matrix.config.experimental }}
     env:
-      USING_COVERAGE: '3.7,3.8,3.9,3.10,3.11,3.12,3.13.0-alpha.5,pypy-3.7,pypy-3.8,pypy-3.9'
+      USING_COVERAGE: '3.7,3.8,3.9,3.10,3.11,3.12,3.13.0-alpha.6,pypy-3.7,pypy-3.8,pypy-3.9'
 
     strategy:
       fail-fast: False
@@ -34,7 +34,7 @@ jobs:
           - {python-version: "3.10", testenvs: "py310-attrs{21.2,21.4,22.2,23.1,23.2,latest},py310-mypy{0.900,0.910,0.921,0.931,1.0.1,1.2.0,1.4.1,1.6.1,latest},py310-sphinx{4,5,6,7},build", experimental: False}
           - {python-version: "3.11", testenvs: "py311-attrs{21.2,21.4,22.2,23.1,23.2,latest},py311-mypy{0.900,0.910,0.921,0.931,1.0.1,1.2.0,1.4.1,1.6.1,latest},py311-sphinx{4,5,6,7},build", experimental: False}
           - {python-version: "3.12", testenvs: "py312-attrs{21.2,21.4,22.2,23.1,23.2,latest},py312-mypy{0.900,0.910,0.921,0.931,1.0.1,1.2.0,1.4.1,1.6.1,latest},py312-sphinx{4,5,6,7},build", experimental: True}
-          - {python-version: "3.13.0-alpha.5", testenvs: "py313-dev-attrs{21.2,21.4,22.2,23.1,23.2,latest},py313-dev-mypy{0.900,0.910,0.921,0.931,1.0.1,1.2.0,1.4.1,1.6.1,latest},py313-dev-sphinx{4,5,6,7},build", experimental: True}
+          - {python-version: "3.13.0-alpha.6", testenvs: "py313-dev-attrs{21.2,21.4,22.2,23.1,23.2,latest},py313-dev-mypy{0.900,0.910,0.921,0.931,1.0.1,1.2.0,1.4.1,1.6.1,latest},py313-dev-sphinx{4,5,6,7},build", experimental: True}
           - {python-version: "pypy-3.7", testenvs: "pypy37-attrs{21.2,21.4,22.2,23.1,23.2,latest},pypy37-sphinx{4,5},build", experimental: False}
           - {python-version: "pypy-3.8", testenvs: "pypy38-attrs{21.2,21.4,22.2,23.1,23.2,latest},pypy38-sphinx{4,5,6,7},build", experimental: False}
           - {python-version: "pypy-3.9", testenvs: "pypy39-attrs{21.2,21.4,22.2,23.1,23.2,latest},pypy39-sphinx{4,5,6,7},build", experimental: True}
diff --git a/pyproject.toml b/pyproject.toml
index 9b34f74..7073504 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -10,13 +10,13 @@ readme = "README.rst"
 keywords = [ "attrs", "documentation", "serde", "sphinx",]
 dynamic = [ "requires-python", "classifiers", "dependencies",]
 
+[project.license]
+file = "LICENSE"
+
 [[project.authors]]
 name = "Dominic Davis-Foster"
 email = "dominic@davis-foster.co.uk"
 
-[project.license]
-file = "LICENSE"
-
 [project.urls]
 Homepage = "https://github.com/domdfcoding/attr_utils"
 "Issue Tracker" = "https://github.com/domdfcoding/attr_utils/issues"