diff --git a/.github/workflows/ci-lean.yml b/.github/workflows/ci-lean.yml
index 5f7732e..ac27ca2 100644
--- a/.github/workflows/ci-lean.yml
+++ b/.github/workflows/ci-lean.yml
@@ -29,7 +29,7 @@ jobs:
       # ============================================================
 
       - name: A1) Checkout repository code
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: A2) Set up Lean toolchain
         uses: leanprover/lean-action@v1
diff --git a/.github/workflows/ci-python-zensical.yml b/.github/workflows/ci-python-zensical.yml
index a91bbd5..ba5d361 100644
--- a/.github/workflows/ci-python-zensical.yml
+++ b/.github/workflows/ci-python-zensical.yml
@@ -48,7 +48,7 @@ jobs:
       # ============================================================
 
       - name: A1) Checkout repository code
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
         # WHY: Required so all subsequent steps can access repo files.
 
       - name: A2) Install uv (with caching)
diff --git a/.github/workflows/deploy-zensical.yml b/.github/workflows/deploy-zensical.yml
index f79eca4..d3421d8 100644
--- a/.github/workflows/deploy-zensical.yml
+++ b/.github/workflows/deploy-zensical.yml
@@ -51,7 +51,7 @@ jobs:
       # ============================================================
 
       - name: A1) Checkout repository code
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
         # WHY: Required so all subsequent steps can access repo files.
 
       - name: A2) Configure GitHub Pages
diff --git a/.github/workflows/links.yml b/.github/workflows/links.yml
index e5966fd..ee5bd2a 100644
--- a/.github/workflows/links.yml
+++ b/.github/workflows/links.yml
@@ -37,7 +37,7 @@ jobs:
 
     steps:
       - name: 1) Checkout repository code
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
         # WHY: Required so Lychee can inspect repository files.
 
       - name: 2) Run Lychee
diff --git a/.github/workflows/sync-upstream.yml b/.github/workflows/sync-upstream.yml
index 72d21c7..942fc94 100644
--- a/.github/workflows/sync-upstream.yml
+++ b/.github/workflows/sync-upstream.yml
@@ -30,7 +30,7 @@ jobs:
       # ============================================================
 
       - name: A1) Checkout repository code
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
         # WHY: Required so all subsequent steps can access repo files.
 
       - name: A2) Install uv (with caching)