diff --git a/.github/workflows/custom.yml b/.github/workflows/custom.yml
index 04f1bdc..d344855 100644
--- a/.github/workflows/custom.yml
+++ b/.github/workflows/custom.yml
@@ -15,29 +15,25 @@ jobs:
       matrix:
         python-version: ["3.13"]
     steps:
-      - name: checkout repo
-        uses: actions/checkout@v4
+      - uses: actions/checkout@v4
 
-      - name: set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v5
+      - name: setup Python with uv
+        id: setup-uv
+        uses: astral-sh/setup-uv@v5
         with:
+          version: latest
           python-version: ${{ matrix.python-version }}
+          enable-cache: true
+          prune-cache: false # do not remove pre-built wheels
+          ignore-nothing-to-cache: true
+          cache-dependency-glob: "**/pyproject.toml"
 
-      - name: get site-packages path
-        id: site_packages
-        run: echo "site_dir=$(python -c 'import site; print(site.getsitepackages()[0])')" > "$GITHUB_OUTPUT"
-
-      - name: cache installed packages
-        uses: actions/cache@v4
-        with:
-          path: ${{ steps.site_packages.outputs.site_dir }}
-          key: ${{ runner.os }}-pip-${{ matrix.python-version }}-${{ hashFiles('**/pyproject.toml') }}
-          restore-keys: ${{ runner.os }}-pip-
+      - name: hint on cache hit
+        if: steps.setup-uv.outputs.cache-hit == 'true'
+        run: echo "Hit cache"
 
       - name: install dependencies
-        run: |
-          python -m pip install --upgrade pip
-          pip install .
+        run: uv pip install .
 
       - name: build my custom calendar
         run: make run
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index f4d62a5..34d79aa 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -15,29 +15,25 @@ jobs:
       matrix:
         python-version: ["3.13"]
     steps:
-      - name: checkout repo
-        uses: actions/checkout@v4
+      - uses: actions/checkout@v4
 
-      - name: set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v5
+      - name: setup Python with uv
+        id: setup-uv
+        uses: astral-sh/setup-uv@v5
         with:
+          version: latest
           python-version: ${{ matrix.python-version }}
+          enable-cache: true
+          prune-cache: false # do not remove pre-built wheels
+          ignore-nothing-to-cache: true
+          cache-dependency-glob: "**/pyproject.toml"
 
-      - name: get site-packages path
-        id: site_packages
-        run: echo "site_dir=$(python -c 'import site; print(site.getsitepackages()[0])')" > "$GITHUB_OUTPUT"
-
-      - name: cache installed packages
-        uses: actions/cache@v4
-        with:
-          path: ${{ steps.site_packages.outputs.site_dir }}
-          key: ${{ runner.os }}-pip-${{ matrix.python-version }}-${{ hashFiles('**/pyproject.toml') }}
-          restore-keys: ${{ runner.os }}-pip-
+      - name: hint on cache hit
+        if: steps.setup-uv.outputs.cache-hit == 'true'
+        run: echo "Hit cache"
 
       - name: install dependencies
-        run: |
-          python -m pip install --upgrade pip
-          pip install .
+        run: uv pip install .
 
       - name: build VNDB calendar with en & ja releases
         run: make en