diff --git a/.github/workflows/performance.yml b/.github/workflows/performance.yml
index 8b0cd1f..123d481 100644
--- a/.github/workflows/performance.yml
+++ b/.github/workflows/performance.yml
@@ -30,7 +30,7 @@ jobs:
         echo "dir=$(pip cache dir)" >> $GITHUB_OUTPUT
         echo "dir=$(pip cache dir)" >> $env:GITHUB_OUTPUT
     - name: pip cache
-      uses: actions/cache@v4
+      uses: actions/cache@v5
       with:
         path: ${{ steps.pip-cache.outputs.dir }}
         key: py${{ matrix.python-version }}-${{ matrix.os }}-pip
diff --git a/.github/workflows/pythontests.yml b/.github/workflows/pythontests.yml
index 6b367c5..8777744 100644
--- a/.github/workflows/pythontests.yml
+++ b/.github/workflows/pythontests.yml
@@ -36,7 +36,7 @@ jobs:
         python -m pip install -U pip # to ensure version > 20 to have cache dir
         echo "dir=$(pip cache dir)" >> $GITHUB_OUTPUT
     - name: pip cache
-      uses: actions/cache@v4
+      uses: actions/cache@v5
       with:
         path: ${{ steps.pip-cache.outputs.dir }}
         key: py${{ matrix.python-version }}-${{ matrix.os }}-pip