diff --git a/Dockerfile b/Dockerfile
index 52d7e20682da7eb23ae713625614e1ecaa61cc41..6b3dce135f189da8d94ae4e7df18ea2eb2b27c47 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,6 @@
 From mambaorg/micromamba:1-bullseye
-#  uid=1000(mambauser) gid=1000(mambauser) groups=1000(mambauser)
+# https://github.com/mamba-org/micromamba-docker
+# uid=1000(mambauser) gid=1000(mambauser) groups=1000(mambauser)
 #RUN id ; ls -ld /var/lib/apt/lists/partial
 USER root
 # update the OS
@@ -17,7 +18,8 @@ RUN 	export MAMBA_ROOT_PREFIX=/opt/conda && \
 	curl https://gitlab.pasteur.fr/tru/micromamba-py310-pytorch-cuda11.7/-/raw/main/conda-env-export.yml > conda-env-export.yml && \
 	micromamba create -y --no-deps --name py310-pytorch-1.13.1 --file conda-env-export.yml && \
 	micromamba activate py310-pytorch-1.13.1  && \
-	micromamba env export > /conda-env-export.yml
+	micromamba env export > /conda-env-export.yml && \
+	micromamba clean --all --yes
 
 ADD https://gitlab.pasteur.fr/tru/micromamba-py310-pytorch-cuda11.7/-/raw/main/runscript.sh /runscript.sh
 RUN chmod 755 /runscript.sh
diff --git a/Singularity b/Singularity
index b2889f18d2b710de4d64706c1c4a1ec7b7378974..d09abd9d7e37d69c330a4c4371bdba8e0274ec5a 100644
--- a/Singularity
+++ b/Singularity
@@ -18,6 +18,7 @@ curl https://gitlab.pasteur.fr/tru/micromamba-py310-pytorch-cuda11.7/-/raw/main/
 micromamba create -y --no-deps --name py310-pytorch-1.13.1 --file conda-env-export.yml && \
 micromamba activate py310-pytorch-1.13.1  && \
 micromamba env export > /conda-env-export.yml
+micromamba clean --all --yes
 
 %runscript
 export MAMBA_ROOT_PREFIX=/opt/conda && \