diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index 0beb6eb..bd1994b 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -24,7 +24,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
diff --git a/.github/workflows/linter.yml b/.github/workflows/linter.yml
index 82d6c3e..aeeda16 100644
--- a/.github/workflows/linter.yml
+++ b/.github/workflows/linter.yml
@@ -6,7 +6,7 @@ jobs:
   linter:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up Node.js 25.x
         uses: actions/setup-node@v6
         with:
diff --git a/.github/workflows/test-autoupdate-action.yml b/.github/workflows/test-autoupdate-action.yml
index c4bcaa9..0419245 100644
--- a/.github/workflows/test-autoupdate-action.yml
+++ b/.github/workflows/test-autoupdate-action.yml
@@ -15,10 +15,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout this repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Checkout target repo (autoupdate-action-unstable)
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           repository: CSSUoB/autoupdate-action-unstable
           token: ${{ secrets.PR_AUTO_UPDATE_TOKEN }}
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 4fb9665..01ef89b 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -8,7 +8,7 @@ jobs:
     permissions:
       id-token: write
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up Node.js 25.x
         uses: actions/setup-node@v6
         with: