diff --git a/.github/workflows/python.yml b/.github/workflows/python.yml
index a9f7ecf..1d17f3a 100644
--- a/.github/workflows/python.yml
+++ b/.github/workflows/python.yml
@@ -23,14 +23,14 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v2
         with:
-          python-version: "3.9"
-     
+          python-version: "3.10"
+
       - name: Install Python packages
         run: python -m pip install --upgrade pip setuptools build
 
       - name: build
         run: python -m build
-      
+
       - name: Store the packages
         uses: actions/upload-artifact@v2
         with:
@@ -40,14 +40,13 @@ jobs:
   test:
     needs:
       - build
-      
+
     runs-on: ubuntu-latest
     name: Test Python ${{ matrix.python.version }}
     strategy:
       fail-fast: false
       matrix:
         python:
-          - {version: '3.9', wheel: 'cp39-cp39'}
           - {version: '3.10', wheel: 'cp310-cp310'}
           - {version: '3.11', wheel: 'cp311-cp311'}
 
@@ -65,7 +64,7 @@ jobs:
         with:
           name: python-package-distributions
           path: dist/
-            
+
       - name: Install Python packages
         run: python -m pip install --upgrade pip pytest
 
@@ -94,7 +93,7 @@ jobs:
         with:
           password: ${{ secrets.testpypi_password }}
           repository_url: https://test.pypi.org/legacy/
-      
+
       - name: Publish 📦 to PyPI
         if: ${{ startsWith(github.ref, 'refs/tags/') }}
         uses: pypa/gh-action-pypi-publish@release/v1
diff --git a/setup.cfg b/setup.cfg
index 95b22e9..9384600 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -10,18 +10,18 @@ classifiers =
     License :: OSI Approved :: GNU General Public License v3 (GPLv3)
     Development Status :: 3 - Alpha
     Intended Audience :: Developers
-    Programming Language :: Python :: 3.9
+    Programming Language :: Python :: 3.10
 
 [options]
 packages = find:
 install_requires =
-    retro-data-structures>=0.18.0
+    retro-data-structures>=0.19.1
     jsonschema>=4.0.0
     ppc-asm
 
 include_package_data = True
 zip_safe = False
-python_requires = >=3.9
+python_requires = >=3.10
 
 [options.packages.find]
 exclude =