diff --git a/.github/workflows/Documenter.yml b/.github/workflows/Documenter.yml
index 66c0d6db..9b69fb45 100644
--- a/.github/workflows/Documenter.yml
+++ b/.github/workflows/Documenter.yml
@@ -37,6 +37,7 @@ jobs:
       - uses: julia-actions/setup-julia@latest
         with:
           version: '1.6'
+      - uses: julia-actions/cache@v1
       - uses: julia-actions/julia-buildpkg@v1
       - name: Install dependencies
         run: julia --project=docs/ -e 'using Pkg; Pkg.develop(PackageSpec(path=pwd())); Pkg.instantiate()'