diff --git a/.github/workflows/git-sumi.yml b/.github/workflows/git-sumi.yml
index 2e8520e..a4b1447 100644
--- a/.github/workflows/git-sumi.yml
+++ b/.github/workflows/git-sumi.yml
@@ -16,7 +16,9 @@ jobs:
     name: Run git-sumi
     runs-on: ubuntu-24.04
     steps:
+      - name: Set header length for dependency updates
+        if: contains(github.event.pull_request.title, 'deps:')
+        run: echo "GIT_SUMI_MAX_HEADER_LENGTH=80" >> $GITHUB_ENV
       - uses: welpo/git-sumi-action@main
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          GIT_SUMI_MAX_HEADER_LENGTH: ${{ contains(github.event.pull_request.title, 'deps:') && '80' || '' }} # Allow longer titles for dependency updates.