diff --git a/.github/workflows/serverless-patch.sh b/.github/workflows/serverless-patch.sh
index ab4f9ccc2..91cb49e38 100755
--- a/.github/workflows/serverless-patch.sh
+++ b/.github/workflows/serverless-patch.sh
@@ -37,7 +37,5 @@ $(cat "$f")
 done
 
 # send data to output parameters
-{
-  echo "PR_BODY='$comment'"
-  echo "PR_DRAFT=$has_rejects"
-} >> "$GITHUB_OUTPUT"
+echo "$comment" > /tmp/pr_body
+echo "PR_DRAFT=$has_rejects" >> "$GITHUB_OUTPUT"
diff --git a/.github/workflows/serverless-patch.yml b/.github/workflows/serverless-patch.yml
index bf0af9100..9dfd063cd 100644
--- a/.github/workflows/serverless-patch.yml
+++ b/.github/workflows/serverless-patch.yml
@@ -47,6 +47,6 @@ jobs:
           title: 'Apply patch from elastic/elasticsearch-js#${{ github.event.pull_request.number }}'
           commit-message: 'Apply patch from elastic/elasticsearch-js#${{ github.event.pull_request.number }}'
           branch-suffix: short-commit-hash
-          body: '${{ steps.apply-patch.outputs.PR_BODY }}'
+          body-path: /tmp/pr_body
           draft: '${{ steps.apply-patch.outputs.PR_DRAFT }}'
           add-paths: ':!*.rej'