diff --git a/docker/backend-dev/Dockerfile b/docker/backend-dev/Dockerfile
index d9b207df..d6260274 100644
--- a/docker/backend-dev/Dockerfile
+++ b/docker/backend-dev/Dockerfile
@@ -1,4 +1,4 @@
-FROM debian:bullseye-slim
+FROM debian:bookworm-slim
 
 LABEL maintainer="Goffi <tmp_dockerfiles@goffi.org>"
 
@@ -33,15 +33,6 @@ 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