diff --git a/.github/workflows/cd-build.yml b/.github/workflows/cd-build.yml
index b2ea973..4da7cb9 100644
--- a/.github/workflows/cd-build.yml
+++ b/.github/workflows/cd-build.yml
@@ -44,7 +44,7 @@ jobs:
       # Upload the rendered HTML so it can be previewed from the run summary
       # on pull requests, where the deploy is skipped.
       - name: Upload built docs
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7
         with:
           name: docs-html
           path: docs/_build
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 4e21da1..c4e0b3c 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -26,7 +26,7 @@ jobs:
         run: python -m build
       
       - name: Store distribution packages
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7
         with:
           name: python-package-distributions
           path: dist/
@@ -43,7 +43,7 @@ jobs:
 
     steps:
       - name: Download distribution packages
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8
         with:
           name: python-package-distributions
           path: dist/