diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index c493bd2..ba2b4ba 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -22,11 +22,11 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
 
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           fetch-depth: 0
 
-      - uses: actions/setup-python@v6
+      - uses: actions/setup-python@ece7cb06caefa5fff74198d8649806c4678c61a1 # v6.3.0
         with:
           python-version: '3.12'
 
@@ -38,7 +38,7 @@ jobs:
       - name: Build documentation (strict)
         run: sphinx-build -W --keep-going docs/ docs/_build/html
 
-      - uses: actions/upload-pages-artifact@v5
+      - uses: actions/upload-pages-artifact@fc324d3547104276b827a68afc52ff2a11cc49c9 # v5.0.0
         with:
           path: 'docs/_build/html'
 
@@ -59,7 +59,7 @@ jobs:
       # project docs); this action only needs to READ the existing Pages
       # config, which works reliably with the `pages: write` scope declared
       # above.
-      - uses: actions/configure-pages@v6
+      - uses: actions/configure-pages@45bfe0192ca1faeb007ade9deae92b16b8254a0d # v6.0.0
 
       - id: deployment
-        uses: actions/deploy-pages@v5
+        uses: actions/deploy-pages@cd2ce8fcbc39b97be8ca5fce6e763baed58fa128 # v5.0.0