diff --git a/.github/workflows/cabal-mac-win.yml b/.github/workflows/cabal-mac-win.yml
index 708b5d1..3697873 100644
--- a/.github/workflows/cabal-mac-win.yml
+++ b/.github/workflows/cabal-mac-win.yml
@@ -105,7 +105,7 @@ jobs:
       # cabal build --dry-run creates dist-newstyle/cache/plan.json
 
     - name: Restore cached build products
-      uses: actions/cache/restore@v5
+      uses: actions/cache/restore@v6
       id: cache
       with:
         path: |
@@ -127,7 +127,7 @@ jobs:
         cabal test all --test-show-details=direct
 
     - name: Cache build products
-      uses: actions/cache/save@v5
+      uses: actions/cache/save@v6
       if:   always() && steps.cache.outputs.cache-hit != 'true'
       with:
         path: |
diff --git a/.github/workflows/haskell-ci.yml b/.github/workflows/haskell-ci.yml
index dc95534..a756dec 100644
--- a/.github/workflows/haskell-ci.yml
+++ b/.github/workflows/haskell-ci.yml
@@ -235,7 +235,7 @@ jobs:
           $CABAL v2-build $ARG_COMPILER $ARG_TESTS $ARG_BENCH --dry-run all
           cabal-plan
       - name: restore cache
-        uses: actions/cache/restore@v4
+        uses: actions/cache/restore@v6
         with:
           key: ${{ runner.os }}-${{ matrix.compiler }}-${{ github.sha }}
           path: ~/.cabal/store
@@ -266,7 +266,7 @@ jobs:
           $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks all
       - name: save cache
         if: always()
-        uses: actions/cache/save@v4
+        uses: actions/cache/save@v6
         with:
           key: ${{ runner.os }}-${{ matrix.compiler }}-${{ github.sha }}
           path: ~/.cabal/store