diff --git a/ddf2/Dockerfile b/ddf2/Dockerfile
index 9dede8f020210e434351ab37eb35a3eacffdfa68..e2ad608e42dd850df58c082a980fe00b1ef51953 100644
--- a/ddf2/Dockerfile
+++ b/ddf2/Dockerfile
@@ -32,7 +32,7 @@ COPY DDFacet /opt/DDFacet
 RUN cp /opt/ddf-pipeline/misc/setup.cfg /opt/DDFacet/ # Fix compile options
 RUN python -m pip install -U pip setuptools wheel
 RUN pip install -U pip setuptools wheel
-RUN python -m pip install numpy==1.16 bdsf==1.8.15
+RUN python -m pip install numpy==1.16 bdsf==1.8.15 emcee
 
 RUN python -m pip install pybind11 future pyregion sshtunnel pymysql psutil
 RUN python -m pip install -U "/opt/DDFacet/[dft-support,moresane-support,testing-requirements,fits-beam-support]"