diff --git a/.github/workflows/codespell.yml b/.github/workflows/codespell.yml
index 015b7f2..6bc0fb6 100644
--- a/.github/workflows/codespell.yml
+++ b/.github/workflows/codespell.yml
@@ -23,7 +23,7 @@ jobs:
           python-version: '3.10'
 
       - name: Cache pip
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           # this path is specific to Ubuntu
           path: ~/.cache/pip
diff --git a/.github/workflows/gh-pages.yml b/.github/workflows/gh-pages.yml
index a81d4bc..f828569 100644
--- a/.github/workflows/gh-pages.yml
+++ b/.github/workflows/gh-pages.yml
@@ -31,7 +31,7 @@ jobs:
         run: echo "::set-output name=dir::$(pip cache dir)"
 
       - name: Cache dependencies
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ${{ steps.pip-cache.outputs.dir }}
           key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}