diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index dc4ef06..022066d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -18,7 +18,7 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
           allow-prereleases: true
-      - uses: astral-sh/setup-uv@v6
+      - uses: astral-sh/setup-uv@08807647e7069bb48b6ef5acd8ec9567f424441b # v8.1.0
         with:
           enable-cache: true
       - name: Run CI
diff --git a/.github/workflows/pypi.yml b/.github/workflows/pypi.yml
index e790eff..36a15fa 100644
--- a/.github/workflows/pypi.yml
+++ b/.github/workflows/pypi.yml
@@ -11,7 +11,7 @@ jobs:
       - uses: actions/setup-python@v6
         with:
           python-version: '3.x'
-      - uses: astral-sh/setup-uv@v6
+      - uses: astral-sh/setup-uv@08807647e7069bb48b6ef5acd8ec9567f424441b # v8.1.0
       - name: Build dists
         run: make build
       - name: Pypi Publish