diff --git a/.github/workflows/code-style.yml b/.github/workflows/code-style.yml
index 5fb5c8e..c8886a9 100644
--- a/.github/workflows/code-style.yml
+++ b/.github/workflows/code-style.yml
@@ -19,7 +19,7 @@ jobs:
     name: Python (ruff)
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions/setup-python@v5
         with:
           python-version: "3.12"
@@ -34,7 +34,7 @@ jobs:
     name: Rust (fmt + clippy)
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: dtolnay/rust-toolchain@stable
         with:
           components: rustfmt, clippy
@@ -53,7 +53,7 @@ jobs:
     name: Go (gofmt + vet)
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions/setup-go@v5
         with:
           go-version: "1.22"
@@ -69,7 +69,7 @@ jobs:
     name: JavaScript (eslint + prettier)
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions/setup-node@v6
         with:
           node-version: "20"
@@ -92,7 +92,7 @@ jobs:
     name: Java (checkstyle)
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions/setup-java@v4
         with:
           java-version: "17"
@@ -106,7 +106,7 @@ jobs:
     name: C# (dotnet format)
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions/setup-dotnet@v4
         with:
           dotnet-version: "8.0"
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index e0e382c..c95431b 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -21,7 +21,7 @@ jobs:
       version: ${{ steps.version.outputs.version }}
       tag: ${{ steps.version.outputs.tag }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
           token: ${{ secrets.RELEASE_TOKEN }}
@@ -82,7 +82,7 @@ jobs:
     needs: prepare
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           ref: ${{ needs.prepare.outputs.tag }}
       - uses: actions/setup-python@v5
@@ -104,7 +104,7 @@ jobs:
     needs: prepare
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           ref: ${{ needs.prepare.outputs.tag }}
       - uses: dtolnay/rust-toolchain@stable
@@ -121,7 +121,7 @@ jobs:
     needs: prepare
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
           ref: ${{ needs.prepare.outputs.tag }}
@@ -139,7 +139,7 @@ jobs:
     needs: prepare
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           ref: ${{ needs.prepare.outputs.tag }}
       - uses: actions/setup-node@v6
@@ -165,7 +165,7 @@ jobs:
     runs-on: ubuntu-22.04
     if: needs.prepare.result == 'success'
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           ref: ${{ needs.prepare.outputs.tag }}
       - uses: actions/setup-java@v4
@@ -190,7 +190,7 @@ jobs:
     needs: prepare
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           ref: ${{ needs.prepare.outputs.tag }}
       - uses: actions/setup-python@v5
@@ -212,7 +212,7 @@ jobs:
     needs: prepare
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           ref: ${{ needs.prepare.outputs.tag }}
       - uses: actions/setup-dotnet@v4
diff --git a/.github/workflows/unit-test.yml b/.github/workflows/unit-test.yml
index 7c922b2..9b0c68f 100644
--- a/.github/workflows/unit-test.yml
+++ b/.github/workflows/unit-test.yml
@@ -20,7 +20,7 @@ jobs:
     runs-on: ubuntu-22.04
     timeout-minutes: 15
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions/setup-python@v5
         with:
           python-version: "3.12"
@@ -39,7 +39,7 @@ jobs:
     runs-on: ubuntu-22.04
     timeout-minutes: 30
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: dtolnay/rust-toolchain@stable
       - uses: Swatinem/rust-cache@v2
         with:
@@ -54,7 +54,7 @@ jobs:
     runs-on: ubuntu-22.04
     timeout-minutes: 15
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions/setup-go@v5
         with:
           go-version: "1.22"
@@ -68,7 +68,7 @@ jobs:
     runs-on: ubuntu-22.04
     timeout-minutes: 15
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions/setup-node@v6
         with:
           node-version: "20"
@@ -86,7 +86,7 @@ jobs:
     runs-on: ubuntu-22.04
     timeout-minutes: 15
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions/setup-java@v4
         with:
           java-version: "17"
@@ -101,7 +101,7 @@ jobs:
     runs-on: ubuntu-22.04
     timeout-minutes: 15
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions/setup-dotnet@v4
         with:
           dotnet-version: "8.0"