diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3978185c..2e29f193 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -59,6 +59,7 @@ jobs:
       uses: astral-sh/setup-uv@v3
       with:
         enable-cache: true
+        cache-suffix: ${{ matrix.os }}-${{ matrix.python-version }}
         cache-dependency-glob: "**/pyproject.toml"
 
     - name: Set up Python ${{ matrix.python-version }}