diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6a96abb..b7eefbe 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -38,7 +38,7 @@ jobs:
   rustfmt:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: dtolnay/rust-toolchain@stable
         with:
           components: rustfmt
@@ -50,7 +50,7 @@ jobs:
       image: tamasfe/taplo:0.8.1
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: taplo lint
         run: taplo lint
       - name: taplo fmt
@@ -59,7 +59,7 @@ jobs:
   clippy:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: install protoc
         uses: taiki-e/install-action@v2
         with:
@@ -79,7 +79,7 @@ jobs:
   docs:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: install protoc
         uses: taiki-e/install-action@v2
         with:
@@ -94,7 +94,7 @@ jobs:
   machete:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: dtolnay/rust-toolchain@stable
       - uses: taiki-e/install-action@cargo-machete
       - name: Check unused dependencies
@@ -103,7 +103,7 @@ jobs:
   unused_dependencies:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: dtolnay/rust-toolchain@nightly
       - name: install protoc
         uses: taiki-e/install-action@v2
@@ -127,7 +127,7 @@ jobs:
           - macos-14
           - windows-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: install toolchain (${{ matrix.toolchain }})
         uses: dtolnay/rust-toolchain@master
         with:
@@ -145,7 +145,7 @@ jobs:
   msrv:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: install protoc
         uses: taiki-e/install-action@v2
         with:
@@ -160,7 +160,7 @@ jobs:
   minimal-versions:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: dtolnay/rust-toolchain@nightly
       - uses: dtolnay/rust-toolchain@stable
       - uses: taiki-e/install-action@cargo-hack
@@ -171,7 +171,7 @@ jobs:
   # kani:
   #   runs-on: ubuntu-latest
   #   steps:
-  #     - uses: actions/checkout@v5
+  #     - uses: actions/checkout@v6
   #     - name: Verify with Kani
   #       uses: model-checking/kani-github-action@v1.1
   #       with:
@@ -180,7 +180,7 @@ jobs:
   no-std:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: dtolnay/rust-toolchain@nightly
       - name: install protoc
         uses: taiki-e/install-action@v2
@@ -208,7 +208,7 @@ jobs:
   semver-checks:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Check semver
         uses: obi1kenobi/cargo-semver-checks-action@v2
 
@@ -216,7 +216,7 @@ jobs:
     name: Check README
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Verify that Defiant version is up to date in README
         run: grep -q "$(sed '/^version = /!d' Cargo.toml | head -n1)" README.md
       - name: Verify that MSRV version is up to date in README