diff --git a/.github/workflows/daily.yml b/.github/workflows/daily.yml
index a56183b15..8e3379db4 100644
--- a/.github/workflows/daily.yml
+++ b/.github/workflows/daily.yml
@@ -42,7 +42,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Set up Python ${{ matrix.python-version }} on ${{ matrix.os }}
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
           cache: pip
@@ -65,7 +65,7 @@ jobs:
       fail-fast: false
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: "3.10"
           cache: pip
@@ -113,7 +113,7 @@ jobs:
         with:
           repository: typeshed-internal/stub_uploader
           path: stub_uploader
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: "3.11"
       - name: Install uv
diff --git a/.github/workflows/meta_tests.yml b/.github/workflows/meta_tests.yml
index eaf34090b..5c32d8ab4 100644
--- a/.github/workflows/meta_tests.yml
+++ b/.github/workflows/meta_tests.yml
@@ -35,7 +35,7 @@ jobs:
       fail-fast: false
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: "3.11"
       - run: curl -LsSf https://astral.sh/uv/install.sh | sh
@@ -50,7 +50,7 @@ jobs:
       fail-fast: false
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: "3.9"
       - run: curl -LsSf https://astral.sh/uv/install.sh | sh
@@ -73,7 +73,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: "3.11"
       - run: curl -LsSf https://astral.sh/uv/install.sh | sh
diff --git a/.github/workflows/mypy_primer.yml b/.github/workflows/mypy_primer.yml
index 082836c1b..5ef85217b 100644
--- a/.github/workflows/mypy_primer.yml
+++ b/.github/workflows/mypy_primer.yml
@@ -29,7 +29,7 @@ jobs:
         with:
           path: typeshed_to_test
           fetch-depth: 0
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: "3.11"
       - name: Install dependencies
diff --git a/.github/workflows/stubsabot.yml b/.github/workflows/stubsabot.yml
index 6d90c032c..2e76e3d9a 100644
--- a/.github/workflows/stubsabot.yml
+++ b/.github/workflows/stubsabot.yml
@@ -24,7 +24,7 @@ jobs:
           # use an ssh key so that checks automatically run on stubsabot PRs
           ssh-key: ${{ secrets.STUBSABOT_SSH_PRIVATE_KEY }}
           fetch-depth: 0
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: "3.11"
       - run: curl -LsSf https://astral.sh/uv/install.sh | sh
diff --git a/.github/workflows/stubtest_stdlib.yml b/.github/workflows/stubtest_stdlib.yml
index 420e90ef8..6bfff85fc 100644
--- a/.github/workflows/stubtest_stdlib.yml
+++ b/.github/workflows/stubtest_stdlib.yml
@@ -38,7 +38,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Set up Python ${{ matrix.python-version }} on ${{ matrix.os }}
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
           cache: pip
diff --git a/.github/workflows/stubtest_third_party.yml b/.github/workflows/stubtest_third_party.yml
index 9778f2205..a5c0f7e79 100644
--- a/.github/workflows/stubtest_third_party.yml
+++ b/.github/workflows/stubtest_third_party.yml
@@ -39,7 +39,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: "3.10"
           cache: pip
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index b2453af4e..f69eb0a21 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -27,7 +27,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: "3.11"
       - run: curl -LsSf https://astral.sh/uv/install.sh | sh
@@ -39,7 +39,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: "3.11"
       - run: ./tests/check_new_syntax.py
@@ -49,7 +49,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: "3.11"
       - name: Install uv
@@ -75,7 +75,7 @@ jobs:
       fail-fast: false
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
       - run: curl -LsSf https://astral.sh/uv/install.sh | sh
@@ -87,7 +87,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: "3.11"
       - run: curl -LsSf https://astral.sh/uv/install.sh | sh
@@ -104,7 +104,7 @@ jobs:
       fail-fast: false
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: "3.11"
       - name: Install uv
@@ -169,7 +169,7 @@ jobs:
         with:
           repository: typeshed-internal/stub_uploader
           path: stub_uploader
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: "3.11"
       - name: Install uv