diff --git a/.github/workflows/continuous-integration.yml b/.github/workflows/continuous-integration.yml
index 5d8dc99..7bcc436 100644
--- a/.github/workflows/continuous-integration.yml
+++ b/.github/workflows/continuous-integration.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Download Earthly.
-        uses: earthly/actions-setup@v1
+        uses: earthly/actions-setup@43211c7a0eae5344d6d79fb4aaf209c8f8866203 # v1.0.13
         with:
           version: v0.8.15
       - name: Checkout code.
diff --git a/.github/workflows/conventional-commits.yml b/.github/workflows/conventional-commits.yml
index 0c5017e..061cf2b 100644
--- a/.github/workflows/conventional-commits.yml
+++ b/.github/workflows/conventional-commits.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Download Earthly.
-        uses: earthly/actions-setup@v1
+        uses: earthly/actions-setup@43211c7a0eae5344d6d79fb4aaf209c8f8866203 # v1.0.13
         with:
           version: v0.8.15
       - name: Checkout code.
diff --git a/.github/workflows/git-history.yml b/.github/workflows/git-history.yml
index 871f4d7..ac99086 100644
--- a/.github/workflows/git-history.yml
+++ b/.github/workflows/git-history.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Download Earthly.
-        uses: earthly/actions-setup@v1
+        uses: earthly/actions-setup@43211c7a0eae5344d6d79fb4aaf209c8f8866203 # v1.0.13
         with:
           version: v0.8.15
       - name: Checkout code.
diff --git a/.github/workflows/github-actions-workflows.yml b/.github/workflows/github-actions-workflows.yml
index 95bc61c..d0c5b74 100644
--- a/.github/workflows/github-actions-workflows.yml
+++ b/.github/workflows/github-actions-workflows.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Download Earthly.
-        uses: earthly/actions-setup@v1
+        uses: earthly/actions-setup@43211c7a0eae5344d6d79fb4aaf209c8f8866203 # v1.0.13
         with:
           version: v0.8.15
       - name: Checkout code.
@@ -24,7 +24,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Download Earthly.
-        uses: earthly/actions-setup@v1
+        uses: earthly/actions-setup@43211c7a0eae5344d6d79fb4aaf209c8f8866203 # v1.0.13
         with:
           version: v0.8.15
       - name: Checkout code.