diff --git a/.github/workflows/audit.yml b/.github/workflows/audit.yml
index 51b44c5..96116f4 100644
--- a/.github/workflows/audit.yml
+++ b/.github/workflows/audit.yml
@@ -15,7 +15,7 @@ jobs:
   security_audit:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: rustsec/audit-check@v1
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/dependabot-changelog.yml b/.github/workflows/dependabot-changelog.yml
index 2effaed..d40e9fb 100644
--- a/.github/workflows/dependabot-changelog.yml
+++ b/.github/workflows/dependabot-changelog.yml
@@ -15,7 +15,7 @@ jobs:
     permissions:
       contents: write
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           token: ${{ secrets.ACTION_TOKEN }}
       - uses: dangoslen/dependabot-changelog-helper@v3
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index d53f83b..6a350d9 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -33,7 +33,7 @@ jobs:
 
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install stable toolchain
         uses: actions-rs/toolchain@v1
@@ -84,7 +84,7 @@ jobs:
     needs: [tests]
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: taiki-e/create-gh-release-action@v1
         with:
           changelog: CHANGELOG.md
diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 144422c..56467b5 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install stable toolchain
         uses: dtolnay/rust-toolchain@stable
@@ -27,7 +27,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install stable toolchain
         uses: dtolnay/rust-toolchain@stable
@@ -58,7 +58,7 @@ jobs:
 
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install stable toolchain
         uses: dtolnay/rust-toolchain@stable
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 36a6cfd..c0281f0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -21,6 +21,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Bump `actix-rt` from 2.8.0 to 2.9.0 ([#670](https://github.com/vbrandl/hoc/pull/670))
 - Bump `actix-web` from 4.3.1 to 4.4.0 ([#673](https://github.com/vbrandl/hoc/pull/673))
 - Bump `awc` from 3.1.1 to 3.2.0 ([#675](https://github.com/vbrandl/hoc/pull/675))
+- Bump `actions/checkout` from 3 to 4 ([#676](https://github.com/vbrandl/hoc/pull/676))
 
 
 ## [0.35.0] 2023-05-04