diff --git a/CAL/Docker/HolographyBase/Dockerfile b/CAL/Docker/HolographyBase/Dockerfile
index 309ebf840ef2e90cd33c3bac56b3aac9a72a4b5b..1251e8cd5690316ed8cc8e357e6e4a85d66a353b 100644
--- a/CAL/Docker/HolographyBase/Dockerfile
+++ b/CAL/Docker/HolographyBase/Dockerfile
@@ -23,7 +23,8 @@ RUN pip3 install dataclasses \
                  astropy==3.2.1 \
                  h5py==2.9.0  \
                  emcee==2.2.1 \
-                 numba==0.45.1
+                 numba==0.45.1 \
+                 matplotlib==3.1.1
 
 FROM base as base-build