diff --git a/.github/workflows/action.yml b/.github/workflows/action.yml
index a7d98277..a6c56368 100644
--- a/.github/workflows/action.yml
+++ b/.github/workflows/action.yml
@@ -34,7 +34,7 @@ jobs:
     runs-on: windows-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v2
+      - uses: actions/setup-python@v5
         with:
           python-version: 3.9
       - uses: ./
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5be101ae..6bc765e7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -21,7 +21,7 @@ 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: ${{ matrix.python-version }}
       - name: Set up Miniconda
@@ -42,7 +42,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Set up Python 3.9
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: 3.9
       - name: Install Nox-under-test
@@ -55,7 +55,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Set up Python 3.9
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: 3.9
       - name: Install Nox-under-test
diff --git a/action.yml b/action.yml
index 6b230160..b4e4b9d3 100644
--- a/action.yml
+++ b/action.yml
@@ -12,7 +12,7 @@ branding:
 runs:
   using: composite
   steps:
-    - uses: actions/setup-python@v4
+    - uses: actions/setup-python@v5
       id: localpython
       with:
         python-version: "3.7 - 3.12"
@@ -24,7 +24,7 @@ runs:
         '${{ steps.localpython.outputs.python-path }}' '${{ github.action_path }}/.github/action_helper.py' '${{ inputs.python-versions }}' >>${GITHUB_OUTPUT}
       shell: bash
 
-    - uses: actions/setup-python@v4
+    - uses: actions/setup-python@v5
       id: allpython
       with:
         python-version: "${{ join(fromJSON(steps.helper.outputs.interpreters), '\n') }}"