diff --git a/.circleci/config.yml b/.circleci/config.yml
index 964e5d3..dcd27d7 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -4,13 +4,14 @@
 #
 version: 2
 jobs:
-  build:
+  build: # runs not using Workflows must have a `build` job as entry point 
+    # directory where steps are run
     working_directory: ~/circleci-demo-python-django
     docker: # run the steps with Docker
       # CircleCI Python images available at: https://hub.docker.com/r/circleci/python/
       - image: circleci/python:3.8.5
         auth:
-          username: $DOCKER_HUB_USER_ID
+          username: $DOCKER_HUB_EMAIL
           password: $DOCKER_HUB_PWD  # context / project UI env-var reference
         environment: # environment variables for primary container
           PIPENV_VENV_IN_PROJECT: true
@@ -18,7 +19,7 @@ jobs:
       # CircleCI PostgreSQL images available at: https://hub.docker.com/r/circleci/postgres/
       - image: circleci/postgres:9.6.9-alpine
         auth:
-          username: $DOCKER_HUB_USER_ID
+          username: $DOCKER_HUB_EMAIL
           password: $DOCKER_HUB_PWD  # context / project UI env-var reference
         environment: # environment variables for the Postgres container.
           POSTGRES_USER: root
@@ -28,19 +29,14 @@ jobs:
       - run: sudo chown -R circleci:circleci /usr/local/bin
       - run: sudo chown -R circleci:circleci /usr/local/lib/python3.8/site-packages
       - restore_cache:
-          keys:
-            - v7-dependencies-{{ checksum "requirements/dev.txt" }}
-            - v7-dependencies-
+      # Read about caching dependencies: https://circleci.com/docs/2.0/caching/
+          key: deps9-{{ .Branch }}-{{ checksum "Pipfile.lock" }}
       - run:
           command: |
             export FLASK_APP=autoapp.py
             pip install -r requirements/dev.txt --user
             flask db upgrade
             flask test
-      - save_cache:
-          paths:
-            - venv
-          key: v7-dependencies-{{ checksum "requirements/dev.txt" }}
   back-deploy-heroku:
     docker:
       - image: buildpack-deps:trusty