diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c7e2f7f0..de3cafdc 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,7 +15,7 @@ jobs:
     name: Test
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - name: Install Rust toolchain
         uses: dtolnay/rust-toolchain@stable
@@ -30,7 +30,7 @@ jobs:
     name: Format
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - name: Install Rust toolchain
         uses: dtolnay/rust-toolchain@stable
@@ -44,7 +44,7 @@ jobs:
     name: Clippy
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - name: Install Rust toolchain
         uses: dtolnay/rust-toolchain@stable
@@ -61,7 +61,7 @@ jobs:
     name: Documentation
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - name: Install Rust toolchain
         uses: dtolnay/rust-toolchain@stable
@@ -79,7 +79,7 @@ jobs:
     runs-on: ubuntu-latest
     if: github.ref == 'refs/heads/main'
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - name: Install Rust toolchain
         uses: dtolnay/rust-toolchain@stable
@@ -94,7 +94,7 @@ jobs:
     name: Excel Add-in (Windows)
     runs-on: windows-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - name: Install Rust toolchain
         uses: dtolnay/rust-toolchain@stable
diff --git a/.github/workflows/cloudflare-pages.yml b/.github/workflows/cloudflare-pages.yml
index 4053ef61..66265a73 100644
--- a/.github/workflows/cloudflare-pages.yml
+++ b/.github/workflows/cloudflare-pages.yml
@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: Setup Node.js
         uses: actions/setup-node@v6
diff --git a/.github/workflows/fly-deploy.yml b/.github/workflows/fly-deploy.yml
index 7cfb4d87..557b732f 100644
--- a/.github/workflows/fly-deploy.yml
+++ b/.github/workflows/fly-deploy.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     concurrency: deploy-group    # optional: ensure only one action runs at a time
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - uses: superfly/flyctl-actions/setup-flyctl@master
       - run: flyctl deploy --remote-only
         env:
diff --git a/.github/workflows/java-release.yml b/.github/workflows/java-release.yml
index 8f53c1fc..420602e6 100644
--- a/.github/workflows/java-release.yml
+++ b/.github/workflows/java-release.yml
@@ -29,7 +29,7 @@ jobs:
           - { runner: macos-latest,   target: aarch64-apple-darwin,      classifier: darwin-aarch64, lib: libconvex_ffi.dylib }
           - { runner: windows-latest, target: x86_64-pc-windows-msvc,    classifier: windows-x86_64, lib: convex_ffi.dll }
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v6
         with:
           persist-credentials: false
 
@@ -58,7 +58,7 @@ jobs:
     needs: natives
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v6
         with:
           persist-credentials: false
 
diff --git a/.github/workflows/java.yml b/.github/workflows/java.yml
index 3a613d88..8142da76 100644
--- a/.github/workflows/java.yml
+++ b/.github/workflows/java.yml
@@ -38,7 +38,7 @@ jobs:
     name: Build native + mvn verify (linux-x86_64)
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           persist-credentials: false
 
diff --git a/.github/workflows/pages.yml b/.github/workflows/pages.yml
index d90fa629..af121347 100644
--- a/.github/workflows/pages.yml
+++ b/.github/workflows/pages.yml
@@ -21,7 +21,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: Setup Rust
         uses: dtolnay/rust-toolchain@stable
diff --git a/.github/workflows/reconcile.yml b/.github/workflows/reconcile.yml
index fda2fb53..de96a022 100644
--- a/.github/workflows/reconcile.yml
+++ b/.github/workflows/reconcile.yml
@@ -18,7 +18,7 @@ jobs:
     name: Convex vs QuantLib
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - name: Install Rust toolchain
         uses: dtolnay/rust-toolchain@stable
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 99c78513..bad4a446 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -23,7 +23,7 @@ jobs:
       version: ${{ steps.tag.outputs.VERSION }}
       tag: ${{ steps.tag.outputs.TAG }}
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           ref: ${{ github.event.inputs.tag || github.ref }}
 
@@ -73,7 +73,7 @@ jobs:
     runs-on: windows-latest
     needs: validate
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           ref: ${{ github.event.inputs.tag || github.ref }}
 
@@ -124,7 +124,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: validate
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           ref: ${{ github.event.inputs.tag || github.ref }}
 
@@ -172,7 +172,7 @@ jobs:
     permissions:
       contents: write
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           fetch-depth: 0
           ref: ${{ github.event.inputs.tag || github.ref }}