diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index d2f5db2..c89dd52 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -38,7 +38,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
diff --git a/.github/workflows/release-please.yml b/.github/workflows/release-please.yml
index 32df451..72cd7f0 100644
--- a/.github/workflows/release-please.yml
+++ b/.github/workflows/release-please.yml
@@ -57,7 +57,7 @@ jobs:
 
       - name: Checkout repository
         if: github.repository_owner == 'ptarmiganlabs'
-        uses: actions/checkout@v3
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
 
       - name: Install dependencies
         run: |
@@ -158,7 +158,7 @@ jobs:
           echo "upload_url : ${{ needs.release-please.outputs.release_upload_url }}"
 
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
 
       - name: Setup node
         uses: actions/setup-node@v3
@@ -249,7 +249,7 @@ jobs:
           echo "upload_url : ${{ needs.release-please.outputs.release_upload_url }}"
 
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
 
       - name: Setup node
         uses: actions/setup-node@v3
@@ -307,7 +307,7 @@ jobs:
           Write-Output 'upload_url      : ${{ needs.release-please.outputs.release_upload_url }}'
 
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
 
       - name: Setup node
         uses: actions/setup-node@v3