Drop support for marshmallow 3

Author: sloria

.github/workflows/build-release.yml

@@ -17,10 +17,8 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - { name: "3.10-ma3", tox: py310-marshmallow3 }
-          - { name: "3.14-ma3", tox: py314-marshmallow3 }
-          - { name: "3.10-ma4", tox: py310-marshmallow4 }
-          - { name: "3.14-ma4", tox: py314-marshmallow4 }
+          - { name: "3.10", tox: py310 }
+          - { name: "3.14", tox: py314 }
           - { name: "lowest", tox: py310-lowest }
           - { name: "3.14-madev", tox: py314-marshmallowdev }
     steps:

CHANGELOG.rst

@@ -1,6 +1,13 @@
 Changelog
 ---------
 
+unreleased
+**********
+
+Other changes:
+
+- Drop support for marshmallow 3, which is EOL.
+
 6.10.0 (2026-03-06)
 *******************
 

README.rst

@@ -2,7 +2,7 @@
 apispec
 *******
 
-|pypi| |build-status| |docs| |marshmallow-support| |openapi|
+|pypi| |build-status| |docs| |openapi|
 
 .. |pypi| image:: https://badgen.net/pypi/v/apispec
     :target: https://pypi.org/project/apispec/
@@ -16,10 +16,6 @@ apispec
    :target: https://apispec.readthedocs.io/
    :alt: Documentation
 
-.. |marshmallow-support| image:: https://badgen.net/badge/marshmallow/3,4?list=1
-    :target: https://marshmallow.readthedocs.io/en/latest/upgrading.html
-    :alt: marshmallow 3|4 compatible
-
 .. |openapi| image:: https://badgen.net/badge/OAS/2,3?list=1&color=cyan
     :target: https://github.com/OAI/OpenAPI-Specification
     :alt: OpenAPI Specification 2/3 compatible

pyproject.toml

@@ -3,16 +3,15 @@ name = "apispec"
 version = "6.10.0"
 description = "A pluggable API specification generator. Currently supports the OpenAPI Specification (f.k.a. the Swagger specification)."
 readme = "README.rst"
-license = { file = "LICENSE" }
-authors = [{ name = "Steven Loria", email = "sloria1@gmail.com" }]
+license = "MIT"
+authors = [{ name = "Steven Loria", email = "oss@stevenloria.com" }]
 maintainers = [
-  { name = "Steven Loria", email = "sloria1@gmail.com" },
+  { name = "Steven Loria", email = "oss@stevenloria.com" },
   { name = "Jérôme Lafréchoux", email = "jerome@jolimont.fr" },
 ]
 classifiers = [
   "Development Status :: 5 - Production/Stable",
   "Intended Audience :: Developers",
-  "License :: OSI Approved :: MIT License",
   "Programming Language :: Python :: 3",
   "Programming Language :: Python :: 3.10",
   "Programming Language :: Python :: 3.11",
@@ -46,13 +45,7 @@ yaml = ["PyYAML>=3.10"]
 marshmallow = ["marshmallow>=3.18.0"]
 
 [dependency-groups]
-docs = [
-  "marshmallow>=3.18.0",
-  "pyyaml",
-  "sphinx-issues",
-  "furo",
-  "sphinx>=8.1",
-]
+docs = ["marshmallow>=4.0.0", "pyyaml", "sphinx-issues", "furo", "sphinx>=8.1"]
 tests = ["openapi-spec-validator", "pytest"]
 dev = [{ include-group = "tests" }, "tox", "tox-uv", "pre-commit>=3.5,<5.0"]
 

tox.ini

@@ -1,7 +1,7 @@
 [tox]
 envlist=
     lint
-    py{310,311,312,313,314}-marshmallow{3,4}
+    py{310,311,312,313,314}
     py314-marshmallowdev
     py310-lowest
     docs
@@ -10,13 +10,12 @@ envlist=
 extras = yaml,marshmallow
 dependency_groups = tests
 deps =
-    marshmallow3: marshmallow>=3.18.0,<4.0.0
     marshmallowdev: https://github.com/marshmallow-code/marshmallow/archive/dev.tar.gz
-    lowest: marshmallow==3.18.0
+    lowest: marshmallow==4.0.0
 commands = pytest {posargs}
 
 [testenv:lint]
-deps = pre-commit~=3.5
+deps = pre-commit
 skip_install = true
 commands = pre-commit run --all-files