diff --git a/Dockerfile b/Dockerfile
index fb640acb..dcc98f56 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,25 +1,26 @@
-#Grab the latest alpine image
-FROM alpine:latest
-
-# Install python and pip
-RUN apk add --no-cache --update python3 py3-pip bash
-ADD ./webapp/requirements.txt /tmp/requirements.txt
-
-# Install dependencies
-RUN pip3 install --no-cache-dir -q -r /tmp/requirements.txt
-
-# Add our code
-ADD ./webapp /opt/webapp/
-WORKDIR /opt/webapp
-
-# Expose is NOT supported by Heroku
-# EXPOSE 5000 		
-
-# Run the image as a non-root user
-RUN adduser -D myuser
-USER myuser
-
-# Run the app.  CMD is required to run on Heroku
-# $PORT is set by Heroku			
-CMD gunicorn --bind 0.0.0.0:$PORT wsgi 
-
+#Grab the latest alpine image
+FROM python:3.9-alpine
+
+# Install python and pip
+RUN apk add --no-cache --update python3 py3-pip bash
+ADD ./webapp/requirements.txt /tmp/requirements.txt
+
+# Install dependencies dans un environnement virtuel
+RUN python3 -m venv /opt/venv
+ENV PATH="/opt/venv/bin:$PATH"
+RUN pip3 install --upgrade pip && pip3 install --no-cache-dir -r /tmp/requirements.txt
+
+# Add our code
+ADD ./webapp /opt/webapp/
+WORKDIR /opt/webapp
+
+# Expose is NOT supported by Heroku
+# EXPOSE 5000 		
+
+# Run the image as a non-root user
+RUN adduser -D myuser
+USER myuser
+
+# Run the app.  CMD is required to run on Heroku
+# $PORT is set by Heroku			
+CMD ["gunicorn", "--bind", "0.0.0.0:$PORT", "wsgi"]
\ No newline at end of file