diff --git a/docker/README b/docker/README
index 32970da0..9713456e 100644
--- a/docker/README
+++ b/docker/README
@@ -1,3 +1,3 @@
-This directory and subdirectories contain files to build and manage Docker images of Salut à Toi.
+This directory and subdirectories contain files to build and manage Docker images of Libervia.
 
 Please refer to documentation for details.
diff --git a/docker/backend-dev/Dockerfile b/docker/backend-dev/Dockerfile
index cdc8f736..d9b207df 100644
--- a/docker/backend-dev/Dockerfile
+++ b/docker/backend-dev/Dockerfile
@@ -7,7 +7,7 @@ ARG DEBIAN_FRONTEND=noninteractive
 
 RUN echo "Building image for Libervia ${REVISION:-dev}" && \
     apt-get update && apt-get upgrade -y && \
-    apt-get install -y --no-install-recommends locales python3-dev python3-venv python3-wheel mercurial libxml2-dev libxslt-dev libcairo2-dev libjpeg-dev libgirepository1.0-dev libdbus-1-dev libdbus-glib-1-dev dbus-x11 cmake && \
+    apt-get install -y --no-install-recommends locales python3-dev python3-venv python3-wheel mercurial libxml2-dev libxslt-dev libcairo2-dev libjpeg-dev libgirepository1.0-dev libdbus-1-dev libdbus-glib-1-dev dbus-x11 cmake python3-gpg git && \
     \
     # will be used to put many Libervia specific data
     mkdir -p /usr/share/libervia/certificates && \
@@ -28,9 +28,21 @@ ENV DOCKER_LIBERVIA_REV=${REVISION:-dev}
 COPY --chown=root:root session.conf /usr/share/dbus-1/session.conf
 
 WORKDIR /home/libervia
-USER libervia
 
-RUN python3 -m venv libervia_env && libervia_env/bin/pip install -U pip wheel && cd /src && \
+RUN apt-get install -y --no-install-recommends libsodium-dev
+USER libervia
+RUN python3 -m venv --system-site-packages libervia_env && libervia_env/bin/pip install -U pip wheel
+
+# temporary needed for new OMEMO
+RUN libervia_env/bin/pip install protobuf==3.20 && \
+    libervia_env/bin/pip install git+https://github.com/Syndace/python-xeddsa.git@stable && \
+    libervia_env/bin/pip install git+https://github.com/Syndace/python-x3dh.git@stable && \
+    libervia_env/bin/pip install git+https://github.com/Syndace/python-doubleratchet.git@stable && \
+    libervia_env/bin/pip install git+https://github.com/Syndace/python-omemo.git@stable && \
+    libervia_env/bin/pip install git+https://github.com/Syndace/python-oldmemo.git && \
+    libervia_env/bin/pip install git+https://github.com/Syndace/python-twomemo.git
+
+RUN cd /src && \
     # We install thoses packages in editable mode, so we can replace them easily with volumes.
     # We need to move *.egg-info (generated by pip) out of src dirs, otherwise mounting
     # local repos without it them cause troubles