diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index e5a2055..873a566 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -13,7 +13,7 @@ jobs:
           - macos-10.15
           - macos-latest
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@50fbc622fc4ef5163becd7fab6573eac35f8462e # v1.2.0
       - name: 'Install Bats Core'
         run: ./.github/workflows/install/darwin/bats-core.sh
       - name: 'Install Bats Support'
@@ -35,7 +35,7 @@ jobs:
           - ubuntu-20.04
           - ubuntu-latest
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@50fbc622fc4ef5163becd7fab6573eac35f8462e # v1.2.0
       - name: 'Install Bats Core'
         run: ./.github/workflows/install/linux/bats-core.sh
       - name: 'Install Bats Support'
@@ -57,7 +57,7 @@ jobs:
           - windows-2019
           - windows-latest
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@50fbc622fc4ef5163becd7fab6573eac35f8462e # v1.2.0
       - name: 'Install Go'
         run: .\.github\workflows\install\windows\go.ps1
       - name: 'Install Go Packages'