diff --git a/.github/workflows/agent-pr-review.yml b/.github/workflows/agent-pr-review.yml
index 6f2f14a5..eeb6c728 100644
--- a/.github/workflows/agent-pr-review.yml
+++ b/.github/workflows/agent-pr-review.yml
@@ -17,14 +17,14 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           ref: ${{ github.event.pull_request.head.ref }}
           repository: ${{ github.event.pull_request.head.repo.full_name }}
           fetch-depth: 0
 
       - name: Set up Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v5
         with:
           node-version: 22
           cache: 'npm'
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7afefa30..727ff004 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -21,12 +21,12 @@ jobs:
 
     steps:
       - name: Check out repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           fetch-depth: 0
 
       - name: Set up Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v5
         with:
           node-version: ${{ matrix.node-version }}
 
@@ -83,7 +83,7 @@ jobs:
 
       - name: Upload dist hash artifact
         if: github.event_name == 'push' && github.ref == 'refs/heads/unstable'
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         with:
           name: dist-hashes-current
           path: artifacts/dist-hashes-current.json
@@ -104,12 +104,12 @@ jobs:
 
     steps:
       - name: Check out repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           fetch-depth: 0
 
       - name: Set up Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v5
         with:
           node-version: ${{ matrix.node-version }}
 
@@ -144,7 +144,7 @@ jobs:
 
       - name: Upload Playwright artifacts
         if: steps.visual.outcome == 'failure'
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         with:
           name: playwright-visual-diffs
           path: |
@@ -168,10 +168,10 @@ jobs:
 
     steps:
       - name: Check out repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Download dist hash artifact
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v5
         with:
           name: dist-hashes-current
           path: artifacts
@@ -327,10 +327,10 @@ jobs:
 
     steps:
       - name: Check out repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Set up Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v5
         with:
           node-version: ${{ matrix.node-version }}
 
@@ -369,10 +369,10 @@ jobs:
 
     steps:
       - name: Check out repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Set up Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v5
         with:
           node-version: ${{ matrix.node-version }}
 
@@ -411,10 +411,10 @@ jobs:
 
     steps:
       - name: Check out repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Set up Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v5
         with:
           node-version: ${{ matrix.node-version }}
 
@@ -457,10 +457,10 @@ jobs:
 
     steps:
       - name: Check out repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Set up Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v5
         with:
           node-version: ${{ matrix.node-version }}
 
@@ -497,10 +497,10 @@ jobs:
 
     steps:
       - name: Check out repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Set up Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v5
         with:
           node-version: ${{ matrix.node-version }}
 
diff --git a/.github/workflows/daily-design-system-audit.yml b/.github/workflows/daily-design-system-audit.yml
index 07693caf..c6cd2e78 100644
--- a/.github/workflows/daily-design-system-audit.yml
+++ b/.github/workflows/daily-design-system-audit.yml
@@ -16,12 +16,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout unstable branch
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           ref: unstable
 
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v5
         with:
           node-version: '22'
           cache: 'npm'
diff --git a/.github/workflows/nsite-archive.yml b/.github/workflows/nsite-archive.yml
index 7f20344b..ba780a40 100644
--- a/.github/workflows/nsite-archive.yml
+++ b/.github/workflows/nsite-archive.yml
@@ -26,9 +26,9 @@ jobs:
   archive:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v5
         with:
           node-version: 22
           cache: npm
@@ -46,7 +46,7 @@ jobs:
       # `path: dist` stores the site files at the artifact root (index.html at top),
       # so the downloaded .zip extracts straight to the nsite site directory.
       - name: Upload site archive
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         with:
           name: bitvid-site-${{ github.ref_name }}-${{ steps.vars.outputs.sha }}
           path: dist
@@ -64,9 +64,9 @@ jobs:
     permissions:
       contents: write
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v5
         with:
           node-version: 22
           cache: npm