diff --git a/data/leuko-expert/minimal/Dockerfile b/data/leuko-expert/minimal/Dockerfile
index 64e7ace..a9cebbf 100644
--- a/data/leuko-expert/minimal/Dockerfile
+++ b/data/leuko-expert/minimal/Dockerfile
@@ -8,3 +8,4 @@ COPY requirements.txt /tmp/requirements.txt
 
 RUN python3 -m pip install --upgrade pip
 RUN pip3 install -r /tmp/requirements.txt
+ENV OMP_NUM_THREADS=1