diff --git a/.github/workflows/xcodeproj.yml b/.github/workflows/xcodeproj.yml
index 0ad6989dc..af151603e 100644
--- a/.github/workflows/xcodeproj.yml
+++ b/.github/workflows/xcodeproj.yml
@@ -12,7 +12,7 @@ jobs:
     name: Build (macOS)
     runs-on: macos-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
       - uses: maxim-lobanov/setup-xcode@v1
         with:
           xcode-version: latest-stable
@@ -22,14 +22,14 @@ jobs:
     name: Build (Linux)
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
       - name: Build
         run: swift build -c release
   test:
     name: Test (macOS / Xcode)
     runs-on: macos-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
       - uses: maxim-lobanov/setup-xcode@v1
         with:
           xcode-version: latest-stable
@@ -41,7 +41,7 @@ jobs:
     name: Test (Linux)
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
       - name: Set Git config
         run: |
           git config --global user.email "xcodeproj@tuist.io"
@@ -53,7 +53,7 @@ jobs:
     name: Swiftlint
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
       - name: GitHub Action for SwiftLint
         uses: norio-nomura/action-swiftlint@3.2.1
         env: