diff --git a/.github/workflows/book.yml b/.github/workflows/book.yml
index db458a3db..031a88b03 100644
--- a/.github/workflows/book.yml
+++ b/.github/workflows/book.yml
@@ -13,7 +13,7 @@ jobs:
   build-and-upload-to-s3:
     runs-on: ubuntu-20.04
     steps:
-      - uses: actions/checkout@master
+      - uses: actions/checkout@v4
 
       - name: Setup mdBook
         uses: peaceiris/actions-mdbook@v1
diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index bdd7b6265..54b355e63 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -71,7 +71,7 @@ jobs:
             VERSION_SUFFIX: ${{ needs.extract-version.outputs.VERSION_SUFFIX }}
             FEATURE_SUFFIX: ${{ matrix.features.version_suffix }}
         steps:
-            - uses: actions/checkout@v3
+            - uses: actions/checkout@v4
             - name: Update Rust
               if: env.SELF_HOSTED_RUNNERS == 'false'
               run: rustup update stable
@@ -106,10 +106,10 @@ jobs:
 
             - name: Set up Docker Buildx
               if: env.SELF_HOSTED_RUNNERS == 'false'
-              uses: docker/setup-buildx-action@v2
+              uses: docker/setup-buildx-action@v3
 
             - name: Build and push
-              uses: docker/build-push-action@v4
+              uses: docker/build-push-action@v5
               with:
                 file: ./Dockerfile.cross
                 context: .
@@ -129,7 +129,7 @@ jobs:
             VERSION_SUFFIX: ${{ needs.extract-version.outputs.VERSION_SUFFIX }}
         steps:
             - name: Set up Docker Buildx
-              uses: docker/setup-buildx-action@v2
+              uses: docker/setup-buildx-action@v3
 
             - name: Dockerhub login
               run: |
@@ -148,7 +148,7 @@ jobs:
             VERSION: ${{ needs.extract-version.outputs.VERSION }}
             VERSION_SUFFIX: ${{ needs.extract-version.outputs.VERSION_SUFFIX }}
         steps:
-            - uses: actions/checkout@v3
+            - uses: actions/checkout@v4
             - name: Dockerhub login
               run: |
                   echo "${DOCKER_PASSWORD}" | docker login --username ${DOCKER_USERNAME} --password-stdin
diff --git a/.github/workflows/linkcheck.yml b/.github/workflows/linkcheck.yml
index 7f5d3e0b6..7e8d9135d 100644
--- a/.github/workflows/linkcheck.yml
+++ b/.github/workflows/linkcheck.yml
@@ -20,7 +20,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Run mdbook server
         run: |
diff --git a/.github/workflows/local-testnet.yml b/.github/workflows/local-testnet.yml
index 75a81ce0e..42293d38a 100644
--- a/.github/workflows/local-testnet.yml
+++ b/.github/workflows/local-testnet.yml
@@ -24,7 +24,7 @@ jobs:
       # Enable portable to prevent issues with caching `blst` for the wrong CPU type
       FEATURES: portable,jemalloc
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Get latest version of stable Rust
         run: rustup update stable
@@ -46,7 +46,7 @@ jobs:
           echo "$(brew --prefix)/opt/gnu-sed/libexec/gnubin" >> $GITHUB_PATH
           echo "$(brew --prefix)/opt/grep/libexec/gnubin" >> $GITHUB_PATH
       # https://github.com/actions/cache/blob/main/examples.md#rust---cargo
-      - uses: actions/cache@v3
+      - uses: actions/cache@v4
         id: cache-cargo
         with:
           path: |
@@ -95,6 +95,6 @@ jobs:
     runs-on: ubuntu-latest
     needs: ["run-local-testnet"]
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Check that success job is dependent on all others
         run: ./scripts/ci/check-success-job.sh ./.github/workflows/local-testnet.yml local-testnet-success
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index a1c72e553..3d23b4110 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -68,7 +68,7 @@ jobs:
         needs: extract-version
         steps:
             - name: Checkout sources
-              uses: actions/checkout@v3
+              uses: actions/checkout@v4
             - name: Get latest version of stable Rust
               if: env.SELF_HOSTED_RUNNERS == 'false'
               run: rustup update stable
@@ -172,17 +172,19 @@ jobs:
             # This is required to share artifacts between different jobs
             # =======================================================================
 
-            - name:  Upload artifact
-              uses:  actions/upload-artifact@v3
+            - name: Upload artifact
+              uses: actions/upload-artifact@v4
               with:
                   name: lighthouse-${{ needs.extract-version.outputs.VERSION }}-${{ matrix.arch }}.tar.gz
                   path: lighthouse-${{ needs.extract-version.outputs.VERSION }}-${{ matrix.arch }}.tar.gz
+                  compression-level: 0
 
             - name: Upload signature
-              uses: actions/upload-artifact@v3
+              uses: actions/upload-artifact@v4
               with:
                   name: lighthouse-${{ needs.extract-version.outputs.VERSION }}-${{ matrix.arch }}.tar.gz.asc
                   path: lighthouse-${{ needs.extract-version.outputs.VERSION }}-${{ matrix.arch }}.tar.gz.asc
+                  compression-level: 0
 
     draft-release:
         name:   Draft Release
@@ -193,7 +195,7 @@ jobs:
         steps:
             # This is necessary for generating the changelog. It has to come before "Download Artifacts" or else it deletes the artifacts.
             - name: Checkout sources
-              uses: actions/checkout@v3
+              uses: actions/checkout@v4
               with:
                   fetch-depth: 0
 
@@ -202,7 +204,7 @@ jobs:
             # ==============================
 
             - name: Download artifacts
-              uses: actions/download-artifact@v3
+              uses: actions/download-artifact@v4
 
             # ==============================
             #       Create release draft
diff --git a/.github/workflows/test-suite.yml b/.github/workflows/test-suite.yml
index 975dc1c8b..c501c8cab 100644
--- a/.github/workflows/test-suite.yml
+++ b/.github/workflows/test-suite.yml
@@ -41,7 +41,7 @@ jobs:
     # Use self-hosted runners only on the sigp repo.
     runs-on: ${{ github.repository == 'sigp/lighthouse' && fromJson('["self-hosted", "linux", "CI", "large"]') || 'ubuntu-latest'  }}
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Get latest version of stable Rust
       if: env.SELF_HOSTED_RUNNERS == 'false'
       uses: moonrepo/setup-rust@v1
@@ -65,7 +65,7 @@ jobs:
     name: release-tests-windows
     runs-on: ${{ github.repository == 'sigp/lighthouse' && fromJson('["self-hosted", "windows", "CI"]') || 'windows-2019'  }}
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Get latest version of stable Rust
       if: env.SELF_HOSTED_RUNNERS == 'false'
       uses: moonrepo/setup-rust@v1
@@ -102,7 +102,7 @@ jobs:
     env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Get latest version of stable Rust
       if: env.SELF_HOSTED_RUNNERS == 'false'
       uses: moonrepo/setup-rust@v1
@@ -121,7 +121,7 @@ jobs:
     env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Get latest version of stable Rust
       uses: moonrepo/setup-rust@v1
       with:
@@ -136,7 +136,7 @@ jobs:
     env:
       GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Get latest version of stable Rust
       uses: moonrepo/setup-rust@v1
       with:
@@ -151,7 +151,7 @@ jobs:
     env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Get latest version of stable Rust
       uses: moonrepo/setup-rust@v1
       with:
@@ -167,7 +167,7 @@ jobs:
     env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Get latest version of stable Rust
       if: env.SELF_HOSTED_RUNNERS == 'false'
       uses: moonrepo/setup-rust@v1
@@ -188,7 +188,7 @@ jobs:
     name: state-transition-vectors-ubuntu
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Get latest version of stable Rust
       uses: moonrepo/setup-rust@v1
       with:
@@ -203,7 +203,7 @@ jobs:
     env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Get latest version of stable Rust
       if: env.SELF_HOSTED_RUNNERS == 'false'
       uses: moonrepo/setup-rust@v1
@@ -220,7 +220,7 @@ jobs:
     name: dockerfile-ubuntu
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Build the root Dockerfile
       run: docker build --build-arg FEATURES=portable -t lighthouse:local .
     - name: Test the built image
@@ -229,7 +229,7 @@ jobs:
     name: eth1-simulator-ubuntu
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Get latest version of stable Rust
       uses: moonrepo/setup-rust@v1
       with:
@@ -245,7 +245,7 @@ jobs:
     name: merge-transition-ubuntu
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Get latest version of stable Rust
       uses: moonrepo/setup-rust@v1
       with:
@@ -261,7 +261,7 @@ jobs:
     name: no-eth1-simulator-ubuntu
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Get latest version of stable Rust
       uses: moonrepo/setup-rust@v1
       with:
@@ -273,7 +273,7 @@ jobs:
     name: syncing-simulator-ubuntu
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Get latest version of stable Rust
       uses: moonrepo/setup-rust@v1
       with:
@@ -292,7 +292,7 @@ jobs:
       # Enable portable to prevent issues with caching `blst` for the wrong CPU type
       FEATURES: jemalloc,portable
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Get latest version of stable Rust
       if: env.SELF_HOSTED_RUNNERS == 'false'
       uses: moonrepo/setup-rust@v1
@@ -325,7 +325,7 @@ jobs:
     name: execution-engine-integration-ubuntu
     runs-on: ${{ github.repository == 'sigp/lighthouse' && fromJson('["self-hosted", "linux", "CI", "small"]') || 'ubuntu-latest'  }}
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Get latest version of stable Rust
       if: env.SELF_HOSTED_RUNNERS == 'false'
       uses: moonrepo/setup-rust@v1
@@ -346,7 +346,7 @@ jobs:
     env:
       CARGO_INCREMENTAL: 1
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Get latest version of stable Rust
       uses: moonrepo/setup-rust@v1
       with:
@@ -372,7 +372,7 @@ jobs:
     name: check-msrv
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Install Rust at Minimum Supported Rust Version (MSRV)
       run: |
         metadata=$(cargo metadata --no-deps --format-version 1)
@@ -384,7 +384,7 @@ jobs:
     name: cargo-udeps
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Get latest version of nightly Rust
       uses: moonrepo/setup-rust@v1
       with:
@@ -406,7 +406,7 @@ jobs:
     name: compile-with-beta-compiler
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Install dependencies
       run: sudo apt update && sudo apt install -y git gcc g++ make cmake pkg-config llvm-dev libclang-dev clang
     - name: Use Rust beta
@@ -417,7 +417,7 @@ jobs:
     name: cli-check
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Get latest version of stable Rust
       uses: moonrepo/setup-rust@v1
       with:
@@ -455,6 +455,6 @@ jobs:
       'cli-check',
     ]
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Check that success job is dependent on all others
         run: ./scripts/ci/check-success-job.sh ./.github/workflows/test-suite.yml test-suite-success