diff --git a/.github/workflows/benchmark.yml b/.github/workflows/benchmark.yml
index c1a9c529..813b094e 100644
--- a/.github/workflows/benchmark.yml
+++ b/.github/workflows/benchmark.yml
@@ -16,6 +16,11 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+# needed to allow julia-actions/cache to delete old caches that it has created
+permissions:
+  actions: write
+  contents: read
+
 jobs:
   benchmark:
     timeout-minutes: 90
@@ -26,6 +31,7 @@ jobs:
         with:
           version: '1.10.2'
       - uses: julia-actions/cache@v2
+        id: julia-cache
         with:
           cache-name: "benchmarks"
       - name: Install dependencies
@@ -64,3 +70,11 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           SSH_KEY: ${{ secrets.DOCUMENTER_KEY }}
+      - name: Save Julia depot cache on cancel or failure
+        id: julia-cache-save
+        if: cancelled() || failure()
+        uses: actions/cache/save@v4
+        with:
+          path: |
+            ${{ steps.julia-cache.outputs.cache-paths }}
+          key: ${{ steps.julia-cache.outputs.cache-key }}
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7db706e3..c9f9dbde 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -22,6 +22,11 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+# needed to allow julia-actions/cache to delete old caches that it has created
+permissions:
+  actions: write
+  contents: read
+
 jobs:
   test:
     timeout-minutes: 60
@@ -58,6 +63,7 @@ jobs:
           version: ${{ matrix.version }}
           arch: ${{ matrix.arch }}
       - uses: julia-actions/cache@v2
+        id: julia-cache
         with:
           cache-name: "tests"
       - uses: julia-actions/julia-buildpkg@v1
@@ -68,3 +74,11 @@ jobs:
           files: lcov.info
           token: ${{ secrets.CODECOV_TOKEN }}
         continue-on-error: true
+      - name: Save Julia depot cache on cancel or failure
+        id: julia-cache-save
+        if: cancelled() || failure()
+        uses: actions/cache/save@v4
+        with:
+          path: |
+            ${{ steps.julia-cache.outputs.cache-paths }}
+          key: ${{ steps.julia-cache.outputs.cache-key }}
diff --git a/.github/workflows/documentation.yml b/.github/workflows/documentation.yml
index 9fab4f29..e293506a 100644
--- a/.github/workflows/documentation.yml
+++ b/.github/workflows/documentation.yml
@@ -23,6 +23,11 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+# needed to allow julia-actions/cache to delete old caches that it has created
+permissions:
+  actions: write
+  contents: read
+
 jobs:
   build-docs:
     timeout-minutes: 30
@@ -31,8 +36,17 @@ jobs:
       - uses: actions/checkout@v5
       - uses: julia-actions/setup-julia@v2
       - uses: julia-actions/cache@v2
+        id: julia-cache
         with:
           cache-name: "docs"
       - uses: julia-actions/julia-docdeploy@v1
         env:
           DOCUMENTER_KEY: ${{ secrets.DOCUMENTER_KEY }}
+      - name: Save Julia depot cache on cancel or failure
+        id: julia-cache-save
+        if: cancelled() || failure()
+        uses: actions/cache/save@v4
+        with:
+          path: |
+            ${{ steps.julia-cache.outputs.cache-paths }}
+          key: ${{ steps.julia-cache.outputs.cache-key }}