diff --git a/.github/workflows/Documenter.yml b/.github/workflows/Documenter.yml
index 5f71bd7..b70b454 100644
--- a/.github/workflows/Documenter.yml
+++ b/.github/workflows/Documenter.yml
@@ -17,6 +17,7 @@ on:
 
 # Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
 permissions:
+  actions: write  # needed to allow julia-actions/cache to proactively delete old caches that it has created
   contents: write
   pages: write
   id-token: write