diff --git a/Dockerfile b/Dockerfile
index 0689e82..de25cd3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -39,8 +39,9 @@ RUN pip install git+https://github.com/BlueBrain/bbp-atlas-data-fetch.git@v0.3.0
 # densities validation
 #RUN pip install -i https://bbpteam.epfl.ch/repository/devpi/simple/ "densities-validation>=0.1.1"
 
-# leaves-only
-RUN pip install git+https://github.com/BlueBrain/cell-density-validations.git #@v0.2.1
+# leaves-only @v0.2.1
+RUN git clone https://github.com/BlueBrain/cell-density-validations.git cell_densities_validations  && \
+    pip install cell_densities_validations/cell-densities/
 
 # module load py-bba-webexporter
 RUN pip install git+https://github.com/BlueBrain/bbp-atlas-web-exporter.git@v3.0.0
diff --git a/requirements.txt b/requirements.txt
index 632be82..f18d67d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,10 +1,13 @@
+pytest
+pytest-cov
+pyyaml
 nexusforge>=0.8.2
-click
+sphinx
+sphinx-bluebrain-theme
+myst-parser
 numpy
-pynrrd
-pyyaml
 voxcell
-pulp==2.7.0  # snakemake 7.32.3 breaks with pulp==2.8.0
-snakemake==7.32.3
+click
 blue-cwl
+pipeline-validator>=0.3.1
 python-gitlab