diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1b85d65..a427f06 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -66,7 +66,7 @@ jobs:
             allow_fail: true
     continue-on-error: ${{ matrix.allow_fail || false }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Install Rust ${{ matrix.rust }}
         uses: dtolnay/rust-toolchain@master
@@ -93,7 +93,7 @@ jobs:
     name: Format
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Install Rust nightly
         uses: dtolnay/rust-toolchain@nightly
@@ -109,7 +109,7 @@ jobs:
     env:
       RUSTDOCFLAGS: -D warnings
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Install Rust stable
         uses: dtolnay/rust-toolchain@stable
@@ -124,7 +124,7 @@ jobs:
     name: Security Audit
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Install Rust stable
         uses: dtolnay/rust-toolchain@stable
@@ -141,7 +141,7 @@ jobs:
     name: REUSE Compliance
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Install reuse
         run: pip install --user reuse
@@ -159,7 +159,7 @@ jobs:
     if: ${{ !inputs.skip_tests }}
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Install Rust stable
         uses: dtolnay/rust-toolchain@stable
@@ -184,7 +184,7 @@ jobs:
 
       - name: Upload test results
         if: always()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: test-results
           path: target/nextest/ci/junit.xml
@@ -205,7 +205,7 @@ jobs:
     needs: test
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Install Rust stable
         uses: dtolnay/rust-toolchain@stable
@@ -237,7 +237,7 @@ jobs:
           fail_ci_if_error: false
 
       - name: Upload coverage report
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: coverage-report
           path: target/llvm-cov/html/
@@ -261,7 +261,7 @@ jobs:
       github.ref == 'refs/heads/main' &&
       !contains(github.event.head_commit.message || '', '[skip ci]')
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
           token: ${{ secrets.GH_TOKEN || secrets.GITHUB_TOKEN }}
@@ -337,7 +337,7 @@ jobs:
       version: ${{ steps.publish.outputs.version }}
       tag: ${{ steps.publish.outputs.tag }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
           token: ${{ secrets.GH_TOKEN || secrets.GITHUB_TOKEN }}