diff --git a/Docker/Dockerfile b/Docker/Dockerfile
index b2d0d68f506300c9c3891a932d91d146288a4974..3019354dc994cca72245e7304e3b5e3076981fcc 100644
--- a/Docker/Dockerfile
+++ b/Docker/Dockerfile
@@ -4,7 +4,7 @@ COPY prefactor/scripts/* /opt/lofar/scripts/
 COPY prefactor/skymodels/* /data/skymodels/
 COPY prefactor/rfistrategies/* /data/rfistrategies/
 COPY prefactor/solutions/ /data/solutions/*
-RUN apt update && apt install vim
+RUN apt update && apt install -y vim python3-numpy
 RUN ln -sf /opt/lofar/scripts/* /usr/local/bin/
 
 RUN chmod +rx /usr/local/bin/*