diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index d3f5ab8..44fd0a4 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -17,6 +17,10 @@ jobs:
   test:
     runs-on: ${{ matrix.os }}
     timeout-minutes: 60
+    permissions:
+      # needed to allow julia-actions/cache to proactively delete old caches that it has created
+      actions: write
+      contents: read
     strategy:
       fail-fast: false
       matrix: