diff --git a/.github/workflows/actionlint.yml b/.github/workflows/actionlint.yml
index 7a4c030..9b2e886 100644
--- a/.github/workflows/actionlint.yml
+++ b/.github/workflows/actionlint.yml
@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
     - name: actionlint
       uses: raven-actions/actionlint@v2
       with:
diff --git a/.github/workflows/functional_tests.yml b/.github/workflows/functional_tests.yml
index 25362d2..229dc60 100644
--- a/.github/workflows/functional_tests.yml
+++ b/.github/workflows/functional_tests.yml
@@ -32,7 +32,7 @@ jobs:
         # see ./github/functional_tests/lake_init/action.yml for more details on lake-init-arguments
         lake-init-arguments: ["standalone", "mathdep math", "tomltest .toml"]
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ./.github/functional_tests/lake_init_success
         with:
           lake-init-arguments: ${{ matrix.lake-init-arguments}}
@@ -41,7 +41,7 @@ jobs:
   lake-init-failure:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ./.github/functional_tests/lake_init_failure
         with:
           toolchain: ${{ env.toolchain }}
@@ -49,7 +49,7 @@ jobs:
   auto-config-true:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ./.github/functional_tests/auto_config_true
         with:
           toolchain: ${{ env.toolchain }}
@@ -57,7 +57,7 @@ jobs:
   auto-config-false:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ./.github/functional_tests/auto_config_false
         with:
           toolchain: ${{ env.toolchain }}
@@ -65,7 +65,7 @@ jobs:
   lake-build-args:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ./.github/functional_tests/lake_build_args
         with:
           toolchain: ${{ env.toolchain }}
@@ -73,7 +73,7 @@ jobs:
   lake-test-args:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ./.github/functional_tests/lake_test_args
         with:
           toolchain: ${{ env.toolchain }}
@@ -81,7 +81,7 @@ jobs:
   detect-mathlib:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ./.github/functional_tests/mathlib_dependency
         with:
           toolchain: ${{ env.toolchain }}
@@ -89,7 +89,7 @@ jobs:
   lake-test-success:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ./.github/functional_tests/lake_test_success
         with:
           toolchain: ${{ env.toolchain }}
@@ -97,7 +97,7 @@ jobs:
   lake-test-failure:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ./.github/functional_tests/lake_test_failure
         with:
           toolchain: ${{ env.toolchain }}
@@ -105,7 +105,7 @@ jobs:
   lake-lint-success:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ./.github/functional_tests/lake_lint_success
         with:
           toolchain: ${{ env.toolchain }}
@@ -113,7 +113,7 @@ jobs:
   lake-lint-failure:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ./.github/functional_tests/lake_lint_failure
         with:
           toolchain: ${{ env.toolchain }}
@@ -121,7 +121,7 @@ jobs:
   lake-check-test-failure:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ./.github/functional_tests/lake_check_test_failure
         with:
           toolchain: ${{ env.toolchain }}
@@ -129,7 +129,7 @@ jobs:
   subdirectory-lake-package:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ./.github/functional_tests/subdirectory_lake_package
         with:
           toolchain: ${{ env.toolchain }}
@@ -137,7 +137,7 @@ jobs:
   reinstall-transient-toolchain:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ./.github/functional_tests/reinstall-transient-toolchain
         with:
           toolchain: ${{ env.toolchain }}
@@ -145,7 +145,7 @@ jobs:
   mk_all-check:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ./.github/functional_tests/mk_all-check
         with:
           toolchain: ${{ env.toolchain }}
@@ -153,7 +153,7 @@ jobs:
   macos-runner:
     runs-on: macos-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ./.github/functional_tests/lake_init_success
         with:
           lake-init-arguments: "standalone"
@@ -162,7 +162,7 @@ jobs:
   windows-runner:
     runs-on: windows-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ./.github/functional_tests/lake_init_success
         with:
           lake-init-arguments: "standalone"
diff --git a/.github/workflows/shellcheck.yml b/.github/workflows/shellcheck.yml
index 56a7097..1b534ce 100644
--- a/.github/workflows/shellcheck.yml
+++ b/.github/workflows/shellcheck.yml
@@ -10,6 +10,6 @@ jobs:
       runs-on: ubuntu-latest
       steps:
         - name: Checkout code
-          uses: actions/checkout@v5
+          uses: actions/checkout@v6
         - name: Run ShellCheck
           uses: azohra/shell-linter@v0.8.0