diff --git a/Dockerfile b/Dockerfile
index 9902722..2a88ac1 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 FROM ubuntu:latest
 
 # important environment variables 
-ENV NODE_VERSION_LTS="4.4.5" NODE_VERSION_STABLE="6.2.1" NVM_DIR="/usr/local/nvm"
+ENV NODE_VERSION_LTS="4.4.5" NODE_VERSION_STABLE="6.2.1" NODE_VERSION_LEGACY="4.4.0" NVM_DIR="/usr/local/nvm"
 
 # Set debconf to run non-interactively and install packages
 RUN echo 'debconf debconf/frontend select Noninteractive' | debconf-set-selections \
diff --git a/Dockerfile_npmts b/Dockerfile_npmts
index a7ab8e5..3a3c4b6 100644
--- a/Dockerfile_npmts
+++ b/Dockerfile_npmts
@@ -1,2 +1,4 @@
 FROM hosttoday/ht-docker-node:npmci
-RUN npm install -g npmts
\ No newline at end of file
+RUN npmci install $NODE_VERSION_STABLE && npm install -g npmts && \
+    npmci install $NODE_VERSION_LEGACY && npm install -g npmts && \
+    npmci install $NODE_VERSION_LTS && npm install -g npmts