diff --git a/.github/workflows/android.yml b/.github/workflows/android.yml
index 60949f1a..f2149b52 100644
--- a/.github/workflows/android.yml
+++ b/.github/workflows/android.yml
@@ -43,7 +43,7 @@ jobs:
             android_abi: x86
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           submodules: true
 
@@ -108,7 +108,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: build-android
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           submodules: true
 
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 97153333..11b4dd19 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -44,13 +44,13 @@ jobs:
         toolchain:
           - stable
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           submodules: ${{ !inputs.test_data_branch }}
           repository: Eppo-exp/eppo-multiplatform
           ref: ${{ env.SDK_BRANCH }}
 
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         if: ${{ inputs.test_data_branch }}
         with:
           repository: Eppo-exp/sdk-test-data
diff --git a/.github/workflows/dart.yml b/.github/workflows/dart.yml
index 9746729a..76f8b439 100644
--- a/.github/workflows/dart.yml
+++ b/.github/workflows/dart.yml
@@ -31,7 +31,7 @@ jobs:
       id-token: write # Required for authentication using OIDC
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           submodules: true
 
diff --git a/.github/workflows/elixir.yml b/.github/workflows/elixir.yml
index aba7219c..59fcc560 100644
--- a/.github/workflows/elixir.yml
+++ b/.github/workflows/elixir.yml
@@ -56,7 +56,7 @@ jobs:
             otp: '26.0'
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           submodules: true
 
diff --git a/.github/workflows/msrv.yml b/.github/workflows/msrv.yml
index 7f96dc28..05b2d140 100644
--- a/.github/workflows/msrv.yml
+++ b/.github/workflows/msrv.yml
@@ -21,7 +21,7 @@ jobs:
           - stable
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           submodules: true
       - uses: actions/cache@v4
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 798227d0..20244687 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -29,7 +29,7 @@ jobs:
     runs-on: ubuntu-latest
     if: ${{ startsWith(github.ref_name, 'eppo_core@') || startsWith(github.ref_name, 'rust-sdk@') }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           submodules: true
       - uses: actions/setup-node@v4
@@ -61,7 +61,7 @@ jobs:
     if: ${{ startsWith(github.ref_name, 'eppo_core@') }}
     needs: publish
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - run: rustup update stable && rustup default stable
       - run: cargo update eppo_core
         working-directory: ruby-sdk
@@ -102,7 +102,7 @@ jobs:
           # - platform: x64-mingw32
           # - platform: x86-mingw-ucrt
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - uses: oxidize-rb/actions/setup-ruby-and-rust@v1
         with:
@@ -223,7 +223,7 @@ jobs:
     if: ${{ startsWith(github.ref_name, 'ruby-sdk@') }}
     needs: cross_gems
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           submodules: true
 
diff --git a/.github/workflows/python.yml b/.github/workflows/python.yml
index 558838af..26dd4770 100644
--- a/.github/workflows/python.yml
+++ b/.github/workflows/python.yml
@@ -61,7 +61,7 @@ jobs:
             target: ppc64le
             manylinux: auto
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           submodules: true
       - uses: actions/setup-python@v5
@@ -138,7 +138,7 @@ jobs:
           - runner: ubuntu-latest
             target: armv7
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           submodules: true
       - uses: actions/setup-python@v5
@@ -202,7 +202,7 @@ jobs:
           - runner: windows-latest
             target: x86
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           submodules: true
       - uses: actions/setup-python@v5
@@ -243,7 +243,7 @@ jobs:
             target: aarch64
         python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           submodules: true
       - uses: actions/setup-python@v5
@@ -277,7 +277,7 @@ jobs:
   sdist:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Build sdist
         uses: PyO3/maturin-action@v1
         with:
diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index 41c49920..0c64cbb8 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -43,7 +43,7 @@ jobs:
           - "3.4"
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           submodules: true
 
diff --git a/.github/workflows/version.yml b/.github/workflows/version.yml
index bf46f765..f59fd1ed 100644
--- a/.github/workflows/version.yml
+++ b/.github/workflows/version.yml
@@ -24,7 +24,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout Repo
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Setup Node.js 20.x
         uses: actions/setup-node@v4