diff --git a/.github/workflows/markdownlint.yml b/.github/workflows/markdownlint.yml
index d5c51a79..254e1599 100644
--- a/.github/workflows/markdownlint.yml
+++ b/.github/workflows/markdownlint.yml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - name: Checkout
-        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
 
       - name: Run markdownlint
         uses: DavidAnson/markdownlint-cli2-action@07035fd053f7be764496c0f8d8f9f41f98305101
diff --git a/.github/workflows/shellcheck.yml b/.github/workflows/shellcheck.yml
index 52ce404d..b10f15fd 100644
--- a/.github/workflows/shellcheck.yml
+++ b/.github/workflows/shellcheck.yml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - name: Checkout
-        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
 
       - name: Run shellcheck
         uses: ludeeus/action-shellcheck@00cae500b08a931fb5698e11e79bfbd38e612a38
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 010787ed..413eaff6 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -14,7 +14,7 @@ jobs:
     name: Check exercises (${{ matrix.os }})
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8
+    - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
 
     - name: Install Zig
       uses: mlugg/setup-zig@fa65c4058643678a4e4a9a60513944a7d8d35440
diff --git a/.github/workflows/zig-fmt.yml b/.github/workflows/zig-fmt.yml
index dfcd2c59..9674ee97 100644
--- a/.github/workflows/zig-fmt.yml
+++ b/.github/workflows/zig-fmt.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
     - name: Checkout
-      uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
 
     - name: Install Zig
       uses: mlugg/setup-zig@fa65c4058643678a4e4a9a60513944a7d8d35440