diff --git a/.github/workflows/-build-artifacts.yml b/.github/workflows/-build-artifacts.yml
index f99932c..83cb00a 100644
--- a/.github/workflows/-build-artifacts.yml
+++ b/.github/workflows/-build-artifacts.yml
@@ -49,7 +49,7 @@ jobs:
   Download-ClinVar:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: ./.github/actions/download-clinvar
 
   # Convert-ClinVar: Convert ClinVar XML file to JSONL.
@@ -57,7 +57,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: Download-ClinVar
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: ./.github/actions/free-disk-space
       - uses: ./.github/actions/convert-clinvar
         with:
@@ -71,7 +71,7 @@ jobs:
     needs:
       - Convert-Clinvar
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: ./.github/actions/free-disk-space
       - uses: ./.github/actions/phenotype-links
         with:
@@ -85,7 +85,7 @@ jobs:
     needs:
       - Convert-Clinvar
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: ./.github/actions/free-disk-space
       - uses: ./.github/actions/gene-variant-report
         with:
@@ -99,7 +99,7 @@ jobs:
     needs:
       - Convert-Clinvar
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: ./.github/actions/free-disk-space
       - uses: ./.github/actions/acmg-class-by-freq
         with:
@@ -113,7 +113,7 @@ jobs:
     needs:
       - Convert-Clinvar
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: ./.github/actions/free-disk-space
       - uses: ./.github/actions/extract-vars
         with:
diff --git a/.github/workflows/cron.yml b/.github/workflows/cron.yml
index 13e9f5a..b75b856 100644
--- a/.github/workflows/cron.yml
+++ b/.github/workflows/cron.yml
@@ -23,7 +23,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           ref: main
           fetch-depth: 0
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 8d5c880..5b617b1 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -18,7 +18,7 @@ jobs:
       release-name: ${{ steps.check-release.outputs.release-name }}
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: setup git config
         run: |
@@ -82,7 +82,7 @@ jobs:
     if: needs.Create-Release.outputs.is-release == 'true'
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Mark release as published
         run: |