diff --git a/.github/workflows/maintenance-check.yml b/.github/workflows/maintenance-check.yml
index e882515..0be1b51 100644
--- a/.github/workflows/maintenance-check.yml
+++ b/.github/workflows/maintenance-check.yml
@@ -21,7 +21,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
-          python-version: '3.8'
+          python-version: '3.10'
 
       - name: Install dependencies
         run: |
diff --git a/.github/workflows/pr-coverage.yml b/.github/workflows/pr-coverage.yml
index b144997..293ce93 100644
--- a/.github/workflows/pr-coverage.yml
+++ b/.github/workflows/pr-coverage.yml
@@ -33,7 +33,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
-          python-version: '3.8'
+          python-version: '3.10'
 
       - name: Install dependencies
         run: |
diff --git a/.github/workflows/pr-tests.yml b/.github/workflows/pr-tests.yml
index 8be8afa..ecd692d 100644
--- a/.github/workflows/pr-tests.yml
+++ b/.github/workflows/pr-tests.yml
@@ -19,7 +19,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.8', '3.12']
+        python-version: ['3.10', '3.12']
 
     steps:
       - uses: actions/checkout@v4
diff --git a/.github/workflows/python-publish.yml b/.github/workflows/python-publish.yml
index ed454ad..54f35dd 100644
--- a/.github/workflows/python-publish.yml
+++ b/.github/workflows/python-publish.yml
@@ -64,7 +64,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
-          python-version: '3.8'
+          python-version: '3.10'
       
       - name: Configure Git
         run: |
@@ -218,10 +218,10 @@ jobs:
         run: |
           git pull origin master
       
-      - name: Set up Python 3.8
+      - name: Set up Python 3.10
         uses: actions/setup-python@v4
         with:
-          python-version: '3.8'
+          python-version: '3.10'
       
       - name: Install dependencies
         run: |
@@ -279,7 +279,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
-          python-version: '3.8'
+          python-version: '3.10'
       
       - name: Download artifacts
         uses: actions/download-artifact@v4
diff --git a/README.md b/README.md
index 597ee56..71341f7 100644
--- a/README.md
+++ b/README.md
@@ -90,7 +90,7 @@ A comprehensive Python client library for the Etsy API v3, providing a modern, t
 
 ## Requirements
 
-- Python 3.8 or higher
+- Python 3.10 or higher
 - An Etsy App API Key (get one at [Etsy Developers](https://www.etsy.com/developers))
 
 ## Installation
diff --git a/docs/plans/2026-02-28-maintenance-workflow-plan.md b/docs/plans/2026-02-28-maintenance-workflow-plan.md
index eb06ac1..ce3a36c 100644
--- a/docs/plans/2026-02-28-maintenance-workflow-plan.md
+++ b/docs/plans/2026-02-28-maintenance-workflow-plan.md
@@ -6,7 +6,7 @@
 
 **Architecture:** Three Python scripts (`fetch_spec.py`, `diff_spec.py`, `audit_sdk.py`) provide the core logic. A pytest test suite covers live API integration. Three Claude Code skills (`/maintain:check`, `/maintain:audit`, `/maintain:test`) orchestrate these tools conversationally. `/maintain:audit` is a full pipeline — it runs the audit script, then Claude Code verifies findings against actual code, prepares a categorized change list, and asks the user whether to implement directly or adjust items first. A `specs/` directory stores baseline and latest OAS specs.
 
-**Tech Stack:** Python 3.8+, requests (already a dependency), pytest, python-dotenv
+**Tech Stack:** Python 3.10+, requests (already a dependency), pytest, python-dotenv
 
 **Design doc:** `docs/plans/2026-02-28-maintenance-workflow-design.md`
 
diff --git a/setup.py b/setup.py
index 2a4a076..ec492cd 100644
--- a/setup.py
+++ b/setup.py
@@ -31,11 +31,16 @@ def read_version():
     long_description_content_type="text/markdown",
     long_description=long_description,
     packages=find_packages(exclude=["tests", "tests.*"]),
+    python_requires=">=3.10",
     install_requires=["requests", "requests-oauthlib"],
     keywords=["python", "etsy", "api"],
     classifiers=[
         "Intended Audience :: Developers",
         "Programming Language :: Python :: 3",
+        "Programming Language :: Python :: 3.10",
+        "Programming Language :: Python :: 3.11",
+        "Programming Language :: Python :: 3.12",
+        "Programming Language :: Python :: 3.13",
         "Operating System :: Unix",
         "Operating System :: MacOS :: MacOS X",
         "Operating System :: Microsoft :: Windows",