diff --git a/Dockerfile b/Dockerfile
index 3d0c947..2192745 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -21,7 +21,7 @@ RUN set -ex \
   done
 
 ENV NPM_CONFIG_LOGLEVEL info
-ENV NODE_VERSION 4.2.2
+ENV NODE_VERSION 6.9.2
 
 RUN \
   cd /tmp && \
diff --git a/README.md b/README.md
index ac06e08..00bb2b4 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,7 @@ Dockerfile that generates an image for people who use [Node.js](http://nodejs.or
 
 ## Build image
 
-    $ docker build -t=ruby-nodejs:4.2.2 .
+    $ docker build -t=ruby-nodejs:6.9.2 .
 
 ## What's included
 
@@ -18,7 +18,7 @@ Dockerfile that generates an image for people who use [Node.js](http://nodejs.or
 
 ## Pull image
 
-    $ docker pull shawnzhu/ruby-nodejs:4.2.2
+    $ docker pull shawnzhu/ruby-nodejs:6.9.2
 
 ## Testing
 
diff --git a/circle.yml b/circle.yml
index 0305ac7..8552834 100644
--- a/circle.yml
+++ b/circle.yml
@@ -4,7 +4,7 @@ machine:
 dependencies:
   override:
     - docker info
-    - docker build -t shawnzhu/ruby-nodejs:4.2.2 .
+    - docker build -t shawnzhu/ruby-nodejs:6.9.2 .
 test:
   override:
-    - node_version=$(docker run --rm shawnzhu/ruby-nodejs:4.2.2 node -v); [[ $node_version == "v4.2.2" ]]
+    - node_version=$(docker run --rm shawnzhu/ruby-nodejs:6.9.2 node -v); [[ $node_version == "v6.9.2" ]]
diff --git a/spec/dockerfile_spec.rb b/spec/dockerfile_spec.rb
index 4710277..82048b6 100644
--- a/spec/dockerfile_spec.rb
+++ b/spec/dockerfile_spec.rb
@@ -21,11 +21,11 @@
   end
 
   describe command('node -v') do
-    its(:stdout) { should match /4\.2\.2/ }
+    its(:stdout) { should match /6\.9\.2/ }
   end
 
   describe command('npm -v') do
-    its(:stdout) { should match /2\.\d{1,2}\.\d{1,2}/ }
+    its(:stdout) { should match /3\.\d{1,2}\.\d{1,2}/ }
   end
 
   def os_version