diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index 2a3a1e1..c70fc1b 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -10,9 +10,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out code
-        uses: actions/checkout@v4
+        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
       - name: Set up Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@65d7f2d534ac1bc67fcd62888c5f4f3d2cb2b236 # v4
         with:
           python-version: 3.9
       - name: Install build tools
@@ -20,7 +20,7 @@ jobs:
       - name: Test python build
         run: python3 -m build
       - name: Upload built artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@a8a3f3ad30e3422c9c7b888a15615d19a852ae32 # v3
         with:
           name: builds
           path: dist
@@ -39,7 +39,7 @@ jobs:
           pip install html2text
           html2text --ignore-images --ignore-links -b 0 htmlcov/index.html >> $GITHUB_STEP_SUMMARY
       - name: Upload coverage results
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@a8a3f3ad30e3422c9c7b888a15615d19a852ae32 # v3
         with:
           name: coverage
           path: htmlcov