diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index 951397e5..031f7013 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -43,7 +43,7 @@ jobs:
         id:    cache-msys2
         with:
           path: 'C:/tools/msys64'
-          key: msys2-${{ matrix.conf.bits }}-${{ steps.get-date.outputs.date }}
+          key: msys2-${{ matrix.conf.bits }}-${{ steps.get-date.outputs.date }}-2
       - name:  Install MSYS2
         if:    steps.cache-msys2.outputs.cache-hit != 'true'
         run:   choco install msys2 --no-progress