diff --git a/.github/workflows/checks.yml b/.github/workflows/checks.yml
index 35d2ad0..736e2e4 100644
--- a/.github/workflows/checks.yml
+++ b/.github/workflows/checks.yml
@@ -13,7 +13,7 @@ jobs:
     name: "Check & Clippy"
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Cache cargo registry
         uses: actions/cache@v4
@@ -48,7 +48,7 @@ jobs:
     name: "Rustdoc"
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Cache cargo registry
         uses: actions/cache@v4
@@ -96,7 +96,7 @@ jobs:
     runs-on: ubuntu-latest
     name: "Formatting"
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - uses: actions-rs/toolchain@v1
         with:
@@ -114,7 +114,7 @@ jobs:
     runs-on: ubuntu-latest
     name: "Cargo Semver Checks"
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: obi1kenobi/cargo-semver-checks-action@v2
         with:
           # exclude the binary package from semver checks, since it is not published as a crate.
@@ -125,7 +125,7 @@ jobs:
     name: "mdBook Documentation"
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Setup mdBook
         uses: peaceiris/actions-mdbook@v2
diff --git a/.github/workflows/publish-docs.yml b/.github/workflows/publish-docs.yml
index 53f4b7a..1431824 100644
--- a/.github/workflows/publish-docs.yml
+++ b/.github/workflows/publish-docs.yml
@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Setup mdBook
         uses: peaceiris/actions-mdbook@v2
diff --git a/.github/workflows/rust-tests.yml b/.github/workflows/rust-tests.yml
index 7d0d4d1..9c05da9 100644
--- a/.github/workflows/rust-tests.yml
+++ b/.github/workflows/rust-tests.yml
@@ -39,7 +39,7 @@ jobs:
           --health-retries 5
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Cache cargo registry
         uses: actions/cache@v4
diff --git a/.github/workflows/security.yml b/.github/workflows/security.yml
index f1d3a32..d8ec7ed 100644
--- a/.github/workflows/security.yml
+++ b/.github/workflows/security.yml
@@ -14,7 +14,7 @@ jobs:
     permissions: write-all
     name: "Audit Rust Dependencies"
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: rustsec/audit-check@v2.0.0
         with:
           token: ${{ secrets.GITHUB_TOKEN }}