diff --git a/images/base/Dockerfile b/images/base/Dockerfile
index 6980964..9acc36d 100644
--- a/images/base/Dockerfile
+++ b/images/base/Dockerfile
@@ -1,47 +1,49 @@
 ARG debianversion=buster
 FROM debian:${debianversion:-buster}
 LABEL maintainer="Software Heritage <sysop@softwareheritage.org>"
 ENV PROJECT_NAME swh-base
 
 RUN export DEBIAN_FRONTEND=noninteractive && \
   apt-get update && apt-get upgrade -y && \
   apt-get install -y \
     apt-transport-https curl lsb-release
 
 RUN echo deb http://deb.debian.org/debian/ $(lsb_release -sc)-backports main \
          > /etc/apt/sources.list.d/backports.list
 
 RUN echo deb [trusted=yes] https://debian.softwareheritage.org/ $(lsb_release -sc)-swh main  \
          > /etc/apt/sources.list.d/softwareheritage.list
 
 RUN mkdir /etc/softwareheritage
 RUN mkdir -p /var/run/gunicorn/swh
 RUN mkdir -p /srv/softwareheritage/objects
 
 ENV SWH_CONFIG_FILENAME=/etc/softwareheritage/config.yml
 ENV LC_ALL=C.UTF-8
 
 RUN export DEBIAN_FRONTEND=noninteractive && \
   apt-get update && \
   apt-get install -y \
     -t $(lsb_release -sc)-backports \
+        gunicorn \
 	postgresql-client \
-	gunicorn3 \
 	python3-dulwich \
     python3-swh.objstorage \
+    python3-swh.objstorage.replayer \
+    python3-swh.model \
     python3-swh.scheduler \
     python3-swh.storage \
     python3-swh.journal \
 	wait-for-it \
 	&& \
   apt-get clean && \
   rm -rf /var/lib/apt/lists/*
 
 
 COPY conf/logconfig.ini /etc/gunicorn/logconfig.ini
 COPY conf/gunicorn.cfg /etc/gunicorn/swh.cfg
 COPY tools/*.sh /srv/softwareheritage/utils/
 RUN chmod +x /srv/softwareheritage/utils/*.sh
 
 COPY base/entrypoint.sh /
 ENTRYPOINT ["/entrypoint.sh"]