diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 7d534ec..7135aa3 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -19,19 +19,27 @@ jobs:
         run: echo ${GITHUB_TOKEN} | docker login -u ${GITHUB_ACTOR} --password-stdin ghcr.io
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      - name: Pull image
+      - name: Pull images
         run: |
-          docker pull ${{ env.IMAGE }}:latest || true
-      - name: Build image
+          docker pull ${{ env.IMAGE }}-builder:latest || true
+          docker pull ${{ env.IMAGE }}-final:latest || true
+      - name: Build images
         run: |
           docker build \
-            --cache-from ${{ env.IMAGE }}:latest \
-            --tag ${{ env.IMAGE }}:latest \
+            --target builder \
+            --cache-from ${{ env.IMAGE }}-builder:latest \
+            --tag ${{ env.IMAGE }}-builder:latest \
+            --file ./project/Dockerfile.prod \
+            "./project"
+          docker build \
+            --cache-from ${{ env.IMAGE }}-final:latest \
+            --tag ${{ env.IMAGE }}-final:latest \
             --file ./project/Dockerfile.prod \
             "./project"
-      - name: Push image
+      - name: Push images
         run: |
-          docker push ${{ env.IMAGE }}:latest
+          docker push ${{ env.IMAGE }}-builder:latest
+          docker push ${{ env.IMAGE }}-final:latest
 
   test:
     name: Test Docker Image
@@ -46,14 +54,21 @@ jobs:
         run: echo ${GITHUB_TOKEN} | docker login -u ${GITHUB_ACTOR} --password-stdin ghcr.io
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      - name: Pull image
+      - name: Pull images
         run: |
-          docker pull ${{ env.IMAGE }}:latest || true
-      - name: Build image
+          docker pull ${{ env.IMAGE }}-builder:latest || true
+          docker pull ${{ env.IMAGE }}-final:latest || true
+      - name: Build images
         run: |
           docker build \
-            --cache-from ${{ env.IMAGE }}:latest \
-            --tag ${{ env.IMAGE }}:latest \
+            --target builder \
+            --cache-from ${{ env.IMAGE }}-builder:latest \
+            --tag ${{ env.IMAGE }}-builder:latest \
+            --file ./project/Dockerfile.prod \
+            "./project"
+          docker build \
+            --cache-from ${{ env.IMAGE }}-final:latest \
+            --tag ${{ env.IMAGE }}-final:latest \
             --file ./project/Dockerfile.prod \
             "./project"
       - name: Run container
@@ -66,7 +81,9 @@ jobs:
             -e DATABASE_URL=sqlite://sqlite.db \
             -e DATABASE_TEST_URL=sqlite://sqlite.db \
             -p 5003:8765 \
-            ${{ env.IMAGE }}:latest
+            ${{ env.IMAGE }}-final:latest
+      - name: Install requirements
+        run: docker exec fastapi-tdd pip install black==23.12.1 flake8==7.0.0 isort==5.13.2 pytest==7.4.4
       - name: Pytest
         run: docker exec fastapi-tdd python -m pytest .
       - name: Flake8
@@ -92,13 +109,21 @@ jobs:
         run: echo ${GITHUB_TOKEN} | docker login -u ${GITHUB_ACTOR} --password-stdin ghcr.io
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      - name: Pull image
+      - name: Pull images
         run: |
-          docker pull ${{ env.IMAGE }}:latest || true
-      - name: Build image
+          docker pull ${{ env.IMAGE }}-builder:latest || true
+          docker pull ${{ env.IMAGE }}-final:latest || true
+      - name: Build images
         run: |
           docker build \
-            --cache-from ${{ env.IMAGE }}:latest \
+            --target builder \
+            --cache-from ${{ env.IMAGE }}-builder:latest \
+            --tag ${{ env.IMAGE }}-builder:latest \
+            --file ./project/Dockerfile.prod \
+            "./project"
+          docker build \
+            --cache-from ${{ env.IMAGE }}-final:latest \
+            --tag ${{ env.IMAGE }}:latest \
             --tag ${{ env.HEROKU_REGISTRY_IMAGE }}:latest \
             --file ./project/Dockerfile.prod \
             "./project"
@@ -107,7 +132,7 @@ jobs:
         env:
           HEROKU_AUTH_TOKEN: ${{ secrets.HEROKU_AUTH_TOKEN }}
       - name: Push to the registry
-        run: docker push ${{ env.HEROKU_REGISTRY_IMAGE }}
+        run: docker push ${{ env.HEROKU_REGISTRY_IMAGE }}:latest
       - name: Set environment variables
         run: |
           echo "HEROKU_REGISTRY_IMAGE=${{ env.HEROKU_REGISTRY_IMAGE }}" >> $GITHUB_ENV
diff --git a/project/Dockerfile b/project/Dockerfile
index b752128..cb8c488 100644
--- a/project/Dockerfile
+++ b/project/Dockerfile
@@ -16,7 +16,8 @@ RUN apt-get update \
 # install python dependencies
 RUN pip install --upgrade pip
 COPY ./requirements.txt .
-RUN pip install -r requirements.txt
+COPY ./requirements-dev.txt .
+RUN pip install -r requirements-dev.txt
 
 # add app
 COPY . .
diff --git a/project/Dockerfile.prod b/project/Dockerfile.prod
index 4015b19..3832eff 100644
--- a/project/Dockerfile.prod
+++ b/project/Dockerfile.prod
@@ -1,3 +1,39 @@
+###########
+# BUILDER #
+###########
+
+# pull official base image
+FROM python:3.12.1-slim-bookworm as builder
+
+# install system dependencies
+RUN apt-get update \
+  && apt-get -y install netcat-traditional gcc postgresql \
+  && apt-get clean
+
+# set work directory
+WORKDIR /usr/src/app
+
+# set environment variables
+ENV PYTHONDONTWRITEBYTECODE 1
+ENV PYTHONUNBUFFERED 1
+
+# install dependencies
+RUN pip install --upgrade pip
+COPY ./requirements.txt .
+RUN pip wheel --no-cache-dir --no-deps --wheel-dir /usr/src/app/wheels -r requirements.txt
+
+# lint
+COPY . /usr/src/app/
+RUN pip install black==23.12.1 flake8==7.0.0 isort==5.13.2
+RUN flake8 .
+RUN black --exclude=migrations . --check
+RUN isort . --check-only
+
+
+#########
+# FINAL #
+#########
+
 # pull official base image
 FROM python:3.12.1-slim-bookworm
 
@@ -25,16 +61,17 @@ RUN apt-get update \
   && apt-get clean
 
 # install python dependencies
+COPY --from=builder /usr/src/app/wheels /wheels
+COPY --from=builder /usr/src/app/requirements.txt .
 RUN pip install --upgrade pip
-COPY ./requirements.txt .
-RUN pip install -r requirements.txt
+RUN pip install --no-cache /wheels/*
 RUN pip install "uvicorn[standard]==0.26.0"
 
 # add app
 COPY . .
 
 # chown all the files to the app user
-RUN chown -R app:app $APP_HOME
+RUN chown -R app:app $HOME
 
 # change to the app user
 USER app
diff --git a/project/app/api/ping.py b/project/app/api/ping.py
index 223fb95..034e33a 100644
--- a/project/app/api/ping.py
+++ b/project/app/api/ping.py
@@ -8,7 +8,7 @@
 @router.get("/ping")
 async def pong(settings: Settings = Depends(get_settings)):
     return {
-        "ping": "pong!!",
+        "ping": "pong!",
         "environment": settings.environment,
         "testing": settings.testing,
     }
diff --git a/project/requirements-dev.txt b/project/requirements-dev.txt
new file mode 100644
index 0000000..475b437
--- /dev/null
+++ b/project/requirements-dev.txt
@@ -0,0 +1,8 @@
+black==23.12.1
+flake8==7.0.0
+isort==5.13.2
+pytest==7.4.4
+pytest-cov==4.1.0
+pytest-xdist==3.5.0
+
+-r requirements.txt
diff --git a/project/requirements.txt b/project/requirements.txt
index 13223a3..9176370 100644
--- a/project/requirements.txt
+++ b/project/requirements.txt
@@ -1,15 +1,9 @@
 aerich==0.7.2
 asyncpg==0.29.0
-black==23.12.1
 fastapi==0.109.0
-flake8==7.0.0
 gunicorn==21.0.1
 httpx==0.26.0
-isort==5.13.2
 newspaper3k==0.2.8
 pydantic-settings==2.1.0
-pytest==7.4.4
-pytest-cov==4.1.0
-pytest-xdist==3.5.0
 tortoise-orm==0.20.0
 uvicorn==0.26.0
diff --git a/project/tests/test_ping.py b/project/tests/test_ping.py
index fd0250d..ef72e0d 100644
--- a/project/tests/test_ping.py
+++ b/project/tests/test_ping.py
@@ -1,4 +1,4 @@
 def test_ping(test_app):
     response = test_app.get("/ping")
     assert response.status_code == 200
-    assert response.json() == {"environment": "dev", "ping": "pong!!", "testing": True}
+    assert response.json() == {"environment": "dev", "ping": "pong!", "testing": True}