diff --git a/Dockerfile b/Dockerfile
index 5c38075..d0ec689 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,7 +2,8 @@ FROM ubuntu:yakkety
 MAINTAINER Tim Byrne <sultan@locehilios.com>
 
 # Install prerequisites
-RUN apt-get update && apt-get install -y git gnupg1 make shellcheck bats expect curl
+RUN apt-get update && apt-get install -y git gnupg1 make shellcheck bats expect curl python-pip
+RUN pip install envtpl
 
 # Force GNUPG version 1 at path /usr/bin/gpg
 RUN ln -fs /usr/bin/gpg1 /usr/bin/gpg