diff --git a/Dockerfile b/Dockerfile
index b659d98..4701e53 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,47 +1,49 @@
 FROM python:3.7
 
 RUN export DEBIAN_FRONTEND=noninteractive && \
   apt-get update && apt-get upgrade -y && \
   apt-get install -y \
     libapr1-dev \
     libaprutil1-dev \
     libpq-dev \
     libsvn-dev \
     libsystemd-dev \
     postgresql-client \
+    r-base-core \
+    r-cran-jsonlite \
     wait-for-it \
     ngrep && \
   apt-get clean && \
   rm -rf /var/lib/apt/lists/*
 
 RUN useradd -md /srv/softwareheritage -s /bin/bash swh
 USER swh
 
 RUN python3 -m venv /srv/softwareheritage/venv
 ENV PATH="/srv/softwareheritage/venv/bin:${PATH}"
 RUN pip install --upgrade pip setuptools wheel
 RUN pip install gunicorn
 
 RUN pip install \
         swh-core[db,http] \
         cassandra-driver \
         swh-deposit \
         swh-indexer \
         swh-journal \
         swh-lister \
         swh-loader-debian \
         swh-loader-dir \
         swh-loader-git \
         swh-loader-mercurial \
         swh-loader-npm \
         swh-loader-pypi \
         swh-loader-svn \
         swh-loader-tar \
         swh-storage \
         swh-objstorage \
         swh-scheduler \
         swh-vault \
         swh-web
 
 COPY utils/*.sh /srv/softwareheritage/utils/
 RUN mkdir -p /srv/softwareheritage/objects