diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index b5848638..1b3b042f 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -97,7 +97,7 @@ jobs:
           path: |
             ~/python
             ~/ssl
-          key: ${{ matrix.os }}-${{ matrix.jid }}-20210628
+          key: ${{ matrix.os }}-${{ matrix.jid }}-20210831
 
       - name: Set env variables
         env: