diff --git a/ci/Dockerfile/ubuntu1604 b/ci/Dockerfile/ubuntu1604
index 2aaa647..5c05411 100644
--- a/ci/Dockerfile/ubuntu1604
+++ b/ci/Dockerfile/ubuntu1604
@@ -7,4 +7,4 @@
   build-essential g++ git bison flex unzip \
   cpio vim-common lsb-release \
   libxml-simple-perl libxml-sax-perl libxml2-dev libxml2-utils xsltproc \
-  wget bc libssl-dev python-matplotlib python-numpy graphviz eatmydata
+  wget bc libssl-dev python-matplotlib python-numpy graphviz eatmydata bsdmainutils