diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 74e68944..32017818 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -29,7 +29,7 @@ jobs:
         with:
           persist-credentials: false
       - name: Set up uv
-        uses: astral-sh/setup-uv@11f9893b081a58869d3b5fccaea48c9e9e46f990
+        uses: astral-sh/setup-uv@c771a70e6277c0a99b617c7a806ffedaca235ff9
         with:
           enable-cache: ${{ github.ref_type != 'tag' }} # zizmor: ignore[cache-poisoning]
       - id: noxenvs-matrix
@@ -119,7 +119,7 @@ jobs:
         if: runner.os == 'Windows' && startsWith(matrix.noxenv, 'tests')
 
       - name: Set up uv
-        uses: astral-sh/setup-uv@11f9893b081a58869d3b5fccaea48c9e9e46f990
+        uses: astral-sh/setup-uv@c771a70e6277c0a99b617c7a806ffedaca235ff9
         with:
           enable-cache: ${{ github.ref_type != 'tag' }} # zizmor: ignore[cache-poisoning]
 
@@ -144,7 +144,7 @@ jobs:
           fetch-depth: 0
           persist-credentials: false
       - name: Set up uv
-        uses: astral-sh/setup-uv@11f9893b081a58869d3b5fccaea48c9e9e46f990
+        uses: astral-sh/setup-uv@c771a70e6277c0a99b617c7a806ffedaca235ff9
         with:
           enable-cache: ${{ github.ref_type != 'tag' }} # zizmor: ignore[cache-poisoning]
 
diff --git a/.github/workflows/zizmor.yml b/.github/workflows/zizmor.yml
index a78aa832..b6b11f95 100644
--- a/.github/workflows/zizmor.yml
+++ b/.github/workflows/zizmor.yml
@@ -26,7 +26,7 @@ jobs:
           persist-credentials: false
 
       - name: Install uv
-        uses: astral-sh/setup-uv@11f9893b081a58869d3b5fccaea48c9e9e46f990 # v8.3.2
+        uses: astral-sh/setup-uv@c771a70e6277c0a99b617c7a806ffedaca235ff9 # v9.0.0
 
       - name: Run zizmor 🌈
         run: uvx zizmor --pedantic --format=sarif .github > results.sarif