diff --git a/.github/workflows/deploy_heroku.yml b/.github/workflows/deploy_heroku.yml
index f442d18..6ff5b06 100644
--- a/.github/workflows/deploy_heroku.yml
+++ b/.github/workflows/deploy_heroku.yml
@@ -25,7 +25,7 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-gradle-
       - name: Deploy to Heroku
-        uses: AkhileshNS/heroku-deploy@v3.13.15
+        uses: AkhileshNS/heroku-deploy@v4
         with:
           heroku_api_key: ${{secrets.HEROKU_API_KEY}}
           heroku_app_name: http4k-irc