diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index 665c504..47cdf82 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -26,7 +26,7 @@ jobs:
         with:
           python-version: "3.11"
       - name: Install the latest version of uv
-        uses: eifinger/setup-uv@v1
+        uses: eifinger/setup-uv@v9.0.0
         with:
           enable-cache: true
       - name: Install Python deps
@@ -69,7 +69,7 @@ jobs:
         run: mkdir -p out/fontspector out/badges
         continue-on-error: true
       - name: Install the latest version of uv
-        uses: eifinger/setup-uv@v1
+        uses: eifinger/setup-uv@v9.0.0
         with:
           enable-cache: true
       - name: Install Python deps
@@ -108,7 +108,7 @@ jobs:
         with:
           python-version: "3.11"
       - name: Install the latest version of uv
-        uses: eifinger/setup-uv@v1
+        uses: eifinger/setup-uv@v9.0.0
         with:
           enable-cache: true
       - name: Install Python deps
@@ -142,7 +142,7 @@ jobs:
         with:
           python-version: "3.11"
       - name: Install the latest version of uv
-        uses: eifinger/setup-uv@v1
+        uses: eifinger/setup-uv@v9.0.0
         with:
           enable-cache: true
       - name: Install xml2/xslt/cairo dev
@@ -198,7 +198,7 @@ jobs:
         with:
           python-version: "3.11"
       - name: Install the latest version of uv
-        uses: eifinger/setup-uv@v1
+        uses: eifinger/setup-uv@v9.0.0
         with:
           enable-cache: true
       - name: Install xml2/xslt/cairo dev
@@ -265,7 +265,7 @@ jobs:
           name: fontbuild
           path: fonts
       - name: Install the latest version of uv
-        uses: eifinger/setup-uv@v1
+        uses: eifinger/setup-uv@v9.0.0
         with:
           enable-cache: true
       - name: Install Python deps