diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 69b6af2..879e6d5 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,7 +16,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v5
         with:
-          python-version: "3.12"
+          python-version: "3.11"
 
       - name: Install poetry
         uses: snok/install-poetry@v1.3.4
@@ -29,7 +29,7 @@ jobs:
         uses: actions/cache@v3
         with:
           path: .venv
-          key: ${{ runner.os }}-venv-${{ hashFiles('**/poetry.lock') }}
+          key: ${{ runner.os }}-venv-${{ hashFiles('**/poetry.lock', '.github/workflows/ci.yml') }}
 
       - name: Run poetry install
         run: poetry install
@@ -56,7 +56,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v5
         with:
-          python-version: "3.12"
+          python-version: "3.11"
 
       - name: Install poetry
         uses: snok/install-poetry@v1.3.4
@@ -69,7 +69,7 @@ jobs:
         uses: actions/cache@v3
         with:
           path: .venv
-          key: ${{ runner.os }}-venv-${{ hashFiles('**/poetry.lock') }}
+          key: ${{ runner.os }}-venv-${{ hashFiles('**/poetry.lock', '.github/workflows/ci.yml') }}
 
       - name: Run poetry install
         run: poetry install