diff --git a/package/docker/Dockerfile b/package/docker/Dockerfile
index 9190083..d85e4f4 100644
--- a/package/docker/Dockerfile
+++ b/package/docker/Dockerfile
@@ -4,7 +4,7 @@ FROM python:3.7-alpine
 ADD . /
 RUN mkdir -p /var/matemat/db /var/matemat/upload \
   && apk --update add libmagic zlib jpeg zlib-dev jpeg-dev build-base \
-  && pip3 install -u . \
+  && pip3 install -e . \
   && apk del zlib-dev jpeg-dev build-base \
   && rm -rf /var/cache/apk /root/.cache/pip \
   && rm -rf /package