diff --git a/.github/workflows/tox.yml b/.github/workflows/tox.yml
index 9724a97..eaa6406 100644
--- a/.github/workflows/tox.yml
+++ b/.github/workflows/tox.yml
@@ -25,7 +25,7 @@ jobs:
       run: |
         set -xu
         python -m pip install --upgrade pip
-        pip install tox==4.6.3
+        pip install tox==4.25.0
     - name: Run Tests
       run: |
         tox --skip-missing-interpreters
diff --git a/Makefile b/Makefile
index 0eccb63..66f95bf 100644
--- a/Makefile
+++ b/Makefile
@@ -59,11 +59,11 @@ coverage:
 	coverage html
 	open htmlcov/index.html
 
-docs: outfile=/tmp/readme-errors
+docs: errfile=/tmp/readme-errors
 docs:
-	rst2html.py README.rst > /dev/null 2> ${outfile}
-	cat ${outfile}
-	test 0 -eq `cat ${outfile} | wc -l`
+	docutils README.rst > /dev/null 2> ${errfile}
+	cat ${errfile}
+	test 0 -eq `cat ${errfile} | wc -l`
 
 tag: TAG:=v${VERSION}
 tag: exit_code=$(shell git ls-remote ${GIT_REMOTE_NAME} | grep -q tags/${TAG}; echo $$?)
diff --git a/pyproject.toml b/pyproject.toml
index 74e0f00..0d71255 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,5 +1,5 @@
 [build-system]
-requires = ["setuptools>=61.0.0", "setuptools-scm[toml]>=5.0.0"]
+requires = ["setuptools>=78.1.0", "setuptools-scm[toml]>=8.2.0"]
 build-backend = "setuptools.build_meta"
 
 [project]
diff --git a/tox.ini b/tox.ini
index d95945e..825239c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -5,9 +5,9 @@ envlist =
     py{310,311,312,313}-django51,
     py{310,311,312,313}-django52,
 requires =
-    tox >= 4.6.3
-    setuptools >= 61.0.0
-    setuptools-scm[toml] >= 5.0.0
+    tox >= 4.25.0
+    setuptools >= 78.1.0
+    setuptools-scm[toml] >= 8.2.0
 
 
 [testenv]
@@ -21,14 +21,12 @@ deps =
     django42: Django>=4.2,<4.3
     django51: Django>=5.1,<5.2
     django52: Django>=5.2,<5.3
-    py39,py310,py311: flake8==3.8.4
-    py312: flake8==5.0
-    py313: flake8==7.1.0
-# TODO: duplicated from pyproject.toml
-    py313: setuptools>=61.0.0
-    py313: setuptools-scm[toml]>=5.0.0
-    docutils==0.15
-    pyhamcrest<2.0
+    # TODO: setuptools duplicated from pyproject.toml
+    py313: setuptools>=78.1.0
+    py313: setuptools-scm[toml]>=8.2.0
+    flake8==7.1.0
+    docutils==0.21.2
+    pyhamcrest==2.0.4
 
 whitelist_externals = make
 allowlist_externals = make