diff --git a/.github/workflows/spellcheck.yaml b/.github/workflows/spellcheck.yaml
index 8c4fab3b..bc4f64ab 100644
--- a/.github/workflows/spellcheck.yaml
+++ b/.github/workflows/spellcheck.yaml
@@ -13,7 +13,7 @@ jobs:
     name: Spellcheck
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3.3.0
+    - uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # v3.3.0
 
     - uses: rojopolis/spellcheck-github-actions@ac661680ce39b15a4a523718af77b52a370b7b7d # 0.30.0
       name: Spellcheck