diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7d8ae7d0..a74ae2c7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -21,7 +21,7 @@ jobs:
       - name: Configure caching
         uses: actions/cache@v2
         with:
-          key: ${{ matrix.os }}-${{ matrix.target }}-testing
+          key: ubuntu-latest-stable-testing
           path: |
             ${{ env.HOME }}/.cargo
             target