diff --git a/.github/workflows/ci_pkg-install.yml b/.github/workflows/ci_pkg-install.yml
index 9f8f0ae..43c1358 100644
--- a/.github/workflows/ci_pkg-install.yml
+++ b/.github/workflows/ci_pkg-install.yml
@@ -19,7 +19,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
-    - uses: actions/setup-python@v4
+    - uses: actions/setup-python@v5
       with:
         python-version: 3.8
 
@@ -49,7 +49,7 @@ jobs:
         python-version: [3.8]  #, 3.9
     steps:
     - uses: actions/checkout@v4
-    - uses: actions/setup-python@v4
+    - uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
 
diff --git a/.github/workflows/ci_testing.yml b/.github/workflows/ci_testing.yml
index 6fccade..588dde2 100644
--- a/.github/workflows/ci_testing.yml
+++ b/.github/workflows/ci_testing.yml
@@ -30,7 +30,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
 
diff --git a/.github/workflows/code-format.yml b/.github/workflows/code-format.yml
index 5745db7..120f13f 100644
--- a/.github/workflows/code-format.yml
+++ b/.github/workflows/code-format.yml
@@ -19,7 +19,7 @@ jobs:
         # for private repo - first is the checkout step, which needs to use unlimited fetch depth for pushing
         #with:
         #  fetch-depth: 0
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
 
       - name: set PY
         run: echo "PY=$(python -VV | sha256sum | cut -d' ' -f1)" >> $GITHUB_ENV
diff --git a/.github/workflows/pypi-release.yml b/.github/workflows/pypi-release.yml
index 85dccf1..293c513 100644
--- a/.github/workflows/pypi-release.yml
+++ b/.github/workflows/pypi-release.yml
@@ -15,7 +15,7 @@ jobs:
 
     steps:
     - uses: actions/checkout@v4
-    - uses: actions/setup-python@v4
+    - uses: actions/setup-python@v5
       with:
         python-version: 3.8