diff --git a/.github/workflows/autopush.yml b/.github/workflows/autopush.yml
index f0b30a9c..e1dfec1a 100644
--- a/.github/workflows/autopush.yml
+++ b/.github/workflows/autopush.yml
@@ -10,7 +10,7 @@ jobs:
         if: startsWith(github.repository, 'inducer/')
         runs-on: ubuntu-latest
         steps:
-        -   uses: actions/checkout@v4
+        -   uses: actions/checkout@v5
         -   run: |
                 curl -L -O https://tiker.net/ci-support-v0
                 . ./ci-support-v0
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 77ae164b..a4d00b4a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,7 +16,7 @@ jobs:
         name: Ruff
         runs-on: ubuntu-latest
         steps:
-        -   uses: actions/checkout@v4
+        -   uses: actions/checkout@v5
             with:
                 submodules: true
         -   uses: astral-sh/setup-uv@v6
@@ -28,13 +28,13 @@ jobs:
         name: Typos
         runs-on: ubuntu-latest
         steps:
-        -   uses: actions/checkout@v4
+        -   uses: actions/checkout@v5
         -   uses: crate-ci/typos@master
 
     basedpyright:
         runs-on: ubuntu-latest
         steps:
-        -   uses: actions/checkout@v4
+        -   uses: actions/checkout@v5
         -   name: "Main Script"
             run: |
                 EXTRA_INSTALL="pytest types-colorama types-Pygments scipy-stubs"
@@ -54,7 +54,7 @@ jobs:
           matrix:
             os: [ubuntu-latest, macos-latest]
         steps:
-        -   uses: actions/checkout@v4
+        -   uses: actions/checkout@v5
         -   name: "Main Script"
             run: |
                 curl -L -O https://gitlab.tiker.net/inducer/ci-support/raw/main/build-and-test-py-project-within-miniconda.sh
@@ -64,7 +64,7 @@ jobs:
         name: Conda Pytest with Intel CL
         runs-on: ubuntu-latest
         steps:
-        -   uses: actions/checkout@v4
+        -   uses: actions/checkout@v5
         -   name: "Main Script"
             run: |
                 curl -L -O https://raw.githubusercontent.com/illinois-scicomp/machine-shop-maintenance/main/install-intel-icd.sh
@@ -83,7 +83,7 @@ jobs:
         name: Conda Pytest without arg check
         runs-on: ubuntu-latest
         steps:
-        -   uses: actions/checkout@v4
+        -   uses: actions/checkout@v5
         -   name: "Main Script"
             run: |
                 curl -L -O https://gitlab.tiker.net/inducer/ci-support/raw/main/build-and-test-py-project-within-miniconda.sh
@@ -94,7 +94,7 @@ jobs:
         name: Conda Pytest Twice (for cache behavior)
         runs-on: ubuntu-latest
         steps:
-        -   uses: actions/checkout@v4
+        -   uses: actions/checkout@v5
         -   name: "Main Script"
             run: |
                 # This test makes sure that loopy can run with kernels loaded from disk cache.
@@ -112,7 +112,7 @@ jobs:
         name: Conda Examples
         runs-on: ubuntu-latest
         steps:
-        -   uses: actions/checkout@v4
+        -   uses: actions/checkout@v5
         -   name: "Main Script"
             run: |
                 curl -L -O https://tiker.net/ci-support-v0
@@ -130,7 +130,7 @@ jobs:
         name: Documentation
         runs-on: ubuntu-latest
         steps:
-        -   uses: actions/checkout@v4
+        -   uses: actions/checkout@v5
         -
             uses: actions/setup-python@v5
             with:
@@ -150,7 +150,7 @@ jobs:
         name: Tests for downstream project ${{ matrix.downstream_project }}
         runs-on: ubuntu-latest
         steps:
-        -   uses: actions/checkout@v4
+        -   uses: actions/checkout@v5
         -   name: "Main Script"
             env:
                 DOWNSTREAM_PROJECT: ${{ matrix.downstream_project }}
@@ -201,7 +201,7 @@ jobs:
             name: Validate CITATION.cff
             runs-on: ubuntu-latest
             steps:
-            -   uses: actions/checkout@v4
+            -   uses: actions/checkout@v5
             -   uses: actions/setup-python@v5
             -   run: |
                     pip install cffconvert