diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 0a9add31..7f85861c 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-24.04
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Check Cargo.toml version vs Git tag
         if: startsWith(github.ref, 'refs/tags/v')
         working-directory: ./light-curve
@@ -60,7 +60,7 @@ jobs:
             cibw_build: cp39-musllinux_aarch64
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           submodules: true
 
@@ -114,7 +114,7 @@ jobs:
         working-directory: ./light-curve
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Setup Python
         uses: actions/setup-python@v6
@@ -171,7 +171,7 @@ jobs:
         working-directory: light-curve-python
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Set up Python
         uses: actions/setup-python@v6
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 49ca7799..27efeb9b 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -14,7 +14,7 @@ jobs:
         working-directory: light-curve
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           submodules: true
       - name: Set up Python 3.13
@@ -45,7 +45,7 @@ jobs:
         working-directory: light-curve
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           submodules: true
       - name: Set up Rust toolchain
@@ -74,7 +74,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up Rust toolchain
         uses: dtolnay/rust-toolchain@master
         with:
@@ -86,7 +86,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up Rust toolchain
         uses: dtolnay/rust-toolchain@master
         with:
@@ -112,7 +112,7 @@ jobs:
         working-directory: light-curve
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           submodules: true
       - uses: dtolnay/rust-toolchain@master
@@ -157,7 +157,7 @@ jobs:
     needs: [ py_build_deps ]
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: dtolnay/rust-toolchain@master
         with:
           toolchain: stable
@@ -192,7 +192,7 @@ jobs:
         working-directory: light-curve
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up Python 3.9
         uses: actions/setup-python@v6
         with: