diff --git a/src/app/Dockerfile b/src/app/Dockerfile
index 5387fb2..e350ec5 100644
--- a/src/app/Dockerfile
+++ b/src/app/Dockerfile
@@ -5,7 +5,6 @@ ENV PYTHONUNBUFFERED=1
 
 RUN wget http://fr.archive.ubuntu.com/ubuntu/pool/universe/p/python-stdlib-extensions/python-tk_2.7.18-1_amd64.deb
 
-RUN pip install --upgrade pip
 RUN pip install django sickit-learn pandas numpy pillow
 
 COPY . /app