diff --git a/.github/workflows/benchmarks.yml b/.github/workflows/benchmarks.yml
index b1b0abd0..997b69e7 100644
--- a/.github/workflows/benchmarks.yml
+++ b/.github/workflows/benchmarks.yml
@@ -22,7 +22,7 @@ jobs:
           fetch-depth: 0
 
       - name: Set up Python and uv
-        uses: astral-sh/setup-uv@v4
+        uses: astral-sh/setup-uv@v6
         with:
           python-version: "3.12"
           enable-cache: true
diff --git a/.github/workflows/ci-additional.yaml b/.github/workflows/ci-additional.yaml
index d6182b83..acdfc1d6 100644
--- a/.github/workflows/ci-additional.yaml
+++ b/.github/workflows/ci-additional.yaml
@@ -44,7 +44,7 @@ jobs:
           fetch-depth: 0 # Fetch all history for all branches and tags.
 
       - name: Set up Python and uv
-        uses: astral-sh/setup-uv@v4
+        uses: astral-sh/setup-uv@v6
         with:
           python-version: ${{ env.PYTHON_VERSION }}
           enable-cache: true
@@ -85,7 +85,7 @@ jobs:
           fetch-depth: 0 # Fetch all history for all branches and tags.
 
       - name: Set up Python and uv
-        uses: astral-sh/setup-uv@v4
+        uses: astral-sh/setup-uv@v6
         with:
           python-version: ${{ env.PYTHON_VERSION }}
           enable-cache: true
diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index d3d20fb2..f4d29138 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -45,7 +45,7 @@ jobs:
         run: |
           echo "PYTHON_VERSION=${{ matrix.python-version }}" >> $GITHUB_ENV
       - name: Set up Python and uv
-        uses: astral-sh/setup-uv@v4
+        uses: astral-sh/setup-uv@v6
         with:
           python-version: ${{ matrix.python-version }}
           enable-cache: true
@@ -99,7 +99,7 @@ jobs:
           repository: "pydata/xarray"
           fetch-depth: 0 # Fetch all history for all branches and tags.
       - name: Set up Python and uv
-        uses: astral-sh/setup-uv@v4
+        uses: astral-sh/setup-uv@v6
         with:
           python-version: "3.13"
           enable-cache: true
diff --git a/.github/workflows/pypi.yaml b/.github/workflows/pypi.yaml
index 3b241c0a..32a603ce 100644
--- a/.github/workflows/pypi.yaml
+++ b/.github/workflows/pypi.yaml
@@ -13,7 +13,7 @@ jobs:
     steps:
       - uses: actions/checkout@v5
       - name: Set up Python and uv
-        uses: astral-sh/setup-uv@v4
+        uses: astral-sh/setup-uv@v6
         with:
           python-version: "3.13"
       - name: Build and publish
diff --git a/.github/workflows/testpypi-release.yaml b/.github/workflows/testpypi-release.yaml
index d0d8520a..59335f83 100644
--- a/.github/workflows/testpypi-release.yaml
+++ b/.github/workflows/testpypi-release.yaml
@@ -22,7 +22,7 @@ jobs:
           fetch-depth: 0
 
       - name: Set up Python and uv
-        uses: astral-sh/setup-uv@v4
+        uses: astral-sh/setup-uv@v6
         with:
           python-version: "3.13"
 
@@ -61,7 +61,7 @@ jobs:
           fetch-depth: 0 # Fetch all history for all branches and tags.
 
       - name: Set up Python and uv
-        uses: astral-sh/setup-uv@v4
+        uses: astral-sh/setup-uv@v6
         with:
           python-version: "3.13"
 
diff --git a/.github/workflows/upstream-dev-ci.yaml b/.github/workflows/upstream-dev-ci.yaml
index b1a75fa7..ee3e8b73 100644
--- a/.github/workflows/upstream-dev-ci.yaml
+++ b/.github/workflows/upstream-dev-ci.yaml
@@ -40,7 +40,7 @@ jobs:
         run: |
           echo "PYTHON_VERSION=${{ matrix.python-version }}" >> $GITHUB_ENV
       - name: Set up Python and uv
-        uses: astral-sh/setup-uv@v4
+        uses: astral-sh/setup-uv@v6
         with:
           python-version: ${{ matrix.python-version }}
           enable-cache: true