diff --git a/.github/workflows/check_and_update_json_date.yml b/.github/workflows/check_and_update_json_date.yml
index 275a303c..69644a9e 100644
--- a/.github/workflows/check_and_update_json_date.yml
+++ b/.github/workflows/check_and_update_json_date.yml
@@ -1,47 +1,42 @@
-name: Update "date_created" in new JSON files
+name: Update JSON and Push Changes
 
 on:
-  pull_request:
-    types:
-      - opened
-      - synchronize
-  workflow_dispatch:
+  push:
+    branches:
+      - main
 
 jobs:
-  update-date-created:
+  update-json:
     runs-on: ubuntu-latest
-    permissions:
-      contents: write
-      pull-requests: write
 
     steps:
-      - name: Checkout PR branch
-        uses: actions/checkout@v4
+      - name: Check out repository
+        uses: actions/checkout@v3
+
+      - name: Authenticate with GitHub App
+        uses: tibdex/github-app-token@v1
         with:
-          fetch-depth: 0
+          app_id: ${{ secrets.JSON_APP_ID }}
+          private_key: ${{ secrets.JSON_APP_KEY }}
 
-      - name: Identify new JSON files
-        id: new-json-files
-        run: |
-          BASE_BRANCH=$(jq -r '.base.ref' < "$GITHUB_EVENT_PATH")
-          git fetch origin $BASE_BRANCH
-          NEW_JSON_FILES=$(git diff --diff-filter=A --name-only origin/$BASE_BRANCH HEAD -- 'json/*.json')
-          echo "NEW_JSON_FILES=$NEW_JSON_FILES" >> $GITHUB_ENV
-
-      - name: Update date_created in new JSON files
-        if: env.NEW_JSON_FILES != ""
+      - name: Modify JSON file
         run: |
+          JSON_FILE="json/mailrise.json"
           TODAY=$(date -u +%Y-%m-%d)
-          for file in $NEW_JSON_FILES; do
-            echo "Updating date_created in $file"
-            jq --arg date "$TODAY" '.date_created = $date' "$file" > temp.json && mv temp.json "$file"
-          done
+          
+          if [ -f "$JSON_FILE" ]; then
+            echo "Updating date_created in $JSON_FILE to $TODAY"
+            jq --arg today "$TODAY" '.date_created = $today' $JSON_FILE > tmp.json && mv tmp.json $JSON_FILE
+          else
+            echo "File $JSON_FILE does not exist."
+            exit 1
+          fi
 
-      - name: Commit and push changes
-        if: env.NEW_JSON_FILES != ""
+      - name: Commit changes
         run: |
-          git config --global user.name "github-actions[bot]"
-          git config --global user.email "github-actions[bot]@users.noreply.github.com"
-          git add $NEW_JSON_FILES
-          git commit -m "Update date_created in new JSON files"
-          git push origin HEAD:${{ github.head_ref }}
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          git add json/mailrise.json
+          git commit -m "Update date_created in mailrise.json to $TODAY"
+          git push origin main
+