diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 568f2c255..e9c26093b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,10 +16,14 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
+      - name: Get PR number
+        id: get-pr-number
+        uses: mgaitan/gha-get-pr-number@main
       - name: Build Start Dispatch
         uses: peter-evans/repository-dispatch@v2
         with:
           event-type: build-start
+          client-payload: '{ "pr-number": ${{ steps.get-pr-number.outputs.number }} }'
       - uses: actions/checkout@v4
       - name: Setup system libraries cache
         id: cache-system-libraries
@@ -63,9 +67,6 @@ jobs:
           pattern: "^(.+?/releases/)tag(/.+?)$"
           string: ${{ steps.release.outputs.html_url }}
           replace-with: "$1download$2/zxing-wasm-${{ steps.commit-id.outputs.id }}.tgz"
-      - name: Get PR number
-        id: get-pr-number
-        uses: mgaitan/gha-get-pr-number@main
       - name: Build Finish Dispatch
         uses: peter-evans/repository-dispatch@v2
         with: