diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7af00a6e..412c3721 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -24,9 +24,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
-          python-version: "3.9"
-          cache: pip
-          cache-dependency-path: requirements.txt
+          python-version: "3.10"
 
       - name: Run pre-commit
         uses: pre-commit/action@v3.0.0
@@ -48,12 +46,15 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
-          python-version: "3.9"
-          cache: pip
-          cache-dependency-path: requirements.txt
+          python-version: "3.10"
 
-      - name: Install requirements
-        run: pip install -r requirements.txt
+      - name: Install Poetry
+        uses: abatilo/actions-poetry@v2.3.0
+        with:
+          poetry-version: 1.6.1
+
+      - name: Install dependencies
+        run: poetry install
 
       - name: Run test
         run: script/test
diff --git a/README.md b/README.md
index 01c3092e..568d1f4f 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,7 @@ Exposing an API to archived case law.
 
 ## Requirements.
 
-Python >= 3.8
+Python >= 3.10
 
 ## Installation & Usage