diff --git a/Dockerfile b/Dockerfile
index 53bed62..c3ced45 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,6 +9,7 @@ RUN apt update -y && apt install -y \
 	python-pip
 RUN pip install pandas
 RUN pip install numpy
+RUN pip install matplotlib
 RUN git clone https://github.com/usnistgov/SCTK.git
 WORKDIR SCTK
 RUN make config && make all && make check &&  make install && make doc