diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 3b95e58..d4d2acd 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -18,11 +18,6 @@ jobs:
         uses: actions/checkout@v4
 
       # Install all supported Python versions as tox will handle them from the single command
-      - name: Setup Python 3.8
-        uses: actions/setup-python@v5
-        with:
-          python-version: "3.8"
-
       - name: Setup Python 3.9
         uses: actions/setup-python@v5
         with:
@@ -43,6 +38,11 @@ jobs:
         with:
           python-version: "3.12"
 
+      - name: Setup Python 3.13
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.13"
+
       - name: Install dependencies
         run: python -m pip install .[dev]
 
diff --git a/README.rst b/README.rst
index 543933b..82f0d9f 100644
--- a/README.rst
+++ b/README.rst
@@ -14,7 +14,7 @@ Features
 * Allows concrete implementations the flexibility to implement abstract properties as instance attributes.
 * ``Interface.adapt()`` can return an implementation wrapper that provides *only* the
   attributes and methods defined by ``Interface``.
-* Supports python 3.8+
+* Supports python 3.9+
 
 **A note on the name**
 
diff --git a/pyproject.toml b/pyproject.toml
index fe8795e..94596cd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,17 +7,17 @@ authors = [
     {name = "Tim Mitchell", email = "tim.mitchell@seequent.com"}
 ]
 readme = "README.rst"
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 classifiers = [
     "Development Status :: 5 - Production/Stable",
     "Intended Audience :: Developers",
     "Topic :: Software Development :: Libraries",
     "License :: OSI Approved :: MIT License",
-    "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
 ]
 license = {file = "LICENSE"}
 
diff --git a/tox.ini b/tox.ini
index 7b03bf3..f61f6ea 100644
--- a/tox.ini
+++ b/tox.ini
@@ -4,7 +4,7 @@
 # and then run "tox" from this directory.
 
 [tox]
-envlist = py38, py39, py310, py311, py312, mypy
+envlist = py39, py310, py311, py312, py313, mypy
 
 [testenv]
 commands =