diff --git a/.github/workflows/tag.yaml b/.github/workflows/tag.yaml
index 5def115..3720b7e 100644
--- a/.github/workflows/tag.yaml
+++ b/.github/workflows/tag.yaml
@@ -15,6 +15,12 @@ jobs:
         uses: actions/checkout@v3
         with:
           fetch-depth: 0
+          # The COMMIT_KEY secret contains a private SSH key. The associated public key
+          # has been added as a deploy key in the GitHub project. See:
+          # https://docs.github.com/en/developers/overview/managing-deploy-keys#deploy-keys
+          # This is necessary to make commits done by github-actions able to trigger
+          # further github-actions. See: https://stackoverflow.com/q/60418323/3018229.
+          ssh-key: "${{secrets.COMMIT_KEY}}"
 
       - name: Create Tag
         run: .github/scripts/tag.sh