diff --git a/sphinx/Dockerfile b/sphinx/Dockerfile
index 3187e3f..65acb09 100644
--- a/sphinx/Dockerfile
+++ b/sphinx/Dockerfile
@@ -1,21 +1,18 @@
 ARG REGISTRY=swh-jenkins
 FROM $REGISTRY/base
 
 USER root
 RUN DEBIAN_FRONTEND=noninteractive apt-get update && \
   apt-get install -y --no-install-recommends \
-    python3-sphinx \
-    sphinx-rtd-theme-common \
+    tox \
     graphviz \
     postgresql-autodoc \
-    python3-sphinxcontrib.httpdomain \
-    python3-recommonmark \
     libffi-dev \
     inkscape \
     dia \
     plantuml \
     myrepos \
     make && \
   rm -rf /var/lib/apt/lists/*
 
 USER jenkins