diff --git a/Dockerfile b/Dockerfile
index 281aa64..d90155e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,9 +3,12 @@ FROM python:3.8.12-alpine
 RUN adduser -D powsybl
 USER powsybl
 WORKDIR /home/powsybl
+
+COPY scripts/requirements.txt ./
+RUN pip3 install --no-cache-dir -r requirements.txt
+
 COPY scripts/ ./
 
-RUN pip3 install -r requirements.txt
 # We call a script here, but it's overwritten at job execution by the way
 # depending at which script should be applied
 # it's a dry-run call by default to avoid unexpected impact with this image