diff --git a/.github/workflows/pypi-publish.yml b/.github/workflows/pypi-publish.yml
index 48a95d5..ce703a5 100644
--- a/.github/workflows/pypi-publish.yml
+++ b/.github/workflows/pypi-publish.yml
@@ -14,10 +14,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout source
-        uses: actions/checkout@v4
+        uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
 
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
         with:
           python-version: '3.12'
 
@@ -28,7 +28,7 @@ jobs:
         run: python -m build
 
       - name: Upload distribution artifacts
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:
           name: dist
           path: dist/
@@ -45,7 +45,7 @@ jobs:
       url: https://pypi.org/p/misp-modules-cli
     steps:
       - name: Download distribution artifacts
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
         with:
           name: dist
           path: dist/
@@ -107,6 +107,6 @@ jobs:
 
       - name: Publish package to PyPI
         if: steps.filter-existing.outputs.has-files == 'true'
-        uses: pypa/gh-action-pypi-publish@release/v1
+        uses: pypa/gh-action-pypi-publish@dc37677b2e1c63e2034f94d8a5b11f265b73ba33 # v1.14.2
         with:
           skip-existing: true