diff --git a/.circleci/config.yml b/.circleci/config.yml
index 1f93aaa..237e0c6 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -2,7 +2,7 @@ version: 2
 jobs:
   build:
     docker:
-      - image: circleci/python:latest
+      - image: circleci/python:3.8
     working_directory: ~/repo
     steps:
       - checkout
@@ -25,7 +25,7 @@ jobs:
           
   test:
     docker: 
-      - image: circleci/python:latest
+      - image: circleci/python:3.8
       - image: circleci/postgres:9.6.2-alpine
         environment:
           POSTGRES_USER: myUser
@@ -75,15 +75,14 @@ jobs:
       - run:
           name: Heroku deploy
           command: |
-            git config --global push.default matching
-            git push https://heroku:$HEROKU_API_KEY@git.heroku.com/$HEROKU_APP_NAME.git main
+            git push https://heroku:$HEROKU_API_KEY@git.heroku.com/$HEROKU_APP_NAME.git HEAD:main
       - run:
           name: Smoke test
           command: |
+            HTTPCODE=`curl -s -o /dev/null -w "%{http_code}" https://devops-project-back.herokuapp.com/api/articles`
             if [[ "$HTTPCODE" -ne 200 ]]; then
               echo "heroku app not responding, failing deploy" \
-              exit 1 \
-              HTTPCODE=`curl -s -o /dev/null -w "%{http_code}" https://$HEROKU_APP_NAME.herokuapp.com/`
+              exit 1; \
             fi
             
   docker-build-and-push: