diff --git a/models/achlys/Dockerfile b/models/achlys/Dockerfile
index fd8137a..a70a90a 100644
--- a/models/achlys/Dockerfile
+++ b/models/achlys/Dockerfile
@@ -1,4 +1,4 @@
-FROM linusseelinger/achlys-ubuntu
+FROM achlys-ubuntu
 
 RUN apt update && apt install -y inotify-tools && \
     rm -rf /var/lib/apt/lists/*
diff --git a/models/l2-sea/Dockerfile b/models/l2-sea/Dockerfile
index 37468b9..02dbc8b 100644
--- a/models/l2-sea/Dockerfile
+++ b/models/l2-sea/Dockerfile
@@ -1,7 +1,8 @@
 FROM ubuntu:latest
 
 RUN apt update && \
-    DEBIAN_FRONTEND="noninteractive" apt install -y python3-pip gfortran liblapack-dev libblas-dev libomp-dev git && \
+    DEBIAN_FRONTEND="noninteractive" apt install -y python3-pip python3-venv gfortran liblapack-dev libblas-dev libomp-dev git && \
+    python3 -m venv venv && . venv/bin/activate && \
     pip install umbridge f90nml
 
 RUN git clone https://github.com/MAORG-CNR-INM/NATO-AVT-331-L2-Sea-Benchmark.git
@@ -15,4 +16,5 @@ RUN mkdir -p /NATO-AVT-331-L2-Sea-Benchmark/examples/DTMB-5415/CPU000 && ln -s /
 COPY umbridge-server.py /
 
 CMD ulimit -s unlimited && \
+    . venv/bin/activate && \
     python3 umbridge-server.py