diff --git a/.editorconfig b/.editorconfig
index 162ee53..dc57784 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -12,7 +12,7 @@ charset = utf-8
 
 # Tab indentation (no size specified)
 [Makefile]
-indent_style = space
+indent_style = tab
 indent_size = 2
 
 # Indentation override for all JS under lib directory
diff --git a/.travis.yml b/.travis.yml
index 6dc5c5d..6c0f797 100755
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,10 +1,20 @@
 language: node_js
 
+os:
+  - linux
+#  - osx
+
+matrix:
+  allow_failures:
+    - os: osx
+
 node_js:
-  - '0.10'
-  - '0.11'
   - '0.12'
-  - "iojs-v1.0.4"
+#  - "iojs-v1.0.4"
+
+sudo: required
+services:
+  - docker
 
 compiler: clang
 
@@ -44,6 +54,8 @@ install:
   # test our module
   - npm test
   - node lib/opencv.js
+  - docker build -t peterbraden/node-opencv-ubuntu-12-04 -f test/Dockerfile-ubuntu-12-04 .
+  - docker build -t peterbraden/node-opencv-ubuntu-14-04 -f test/Dockerfile-ubuntu-14-04 .
 
 before_script:
   - echo "Publishing native platform Binary Package? ->" $PUBLISH_BINARY
diff --git a/Dockerfile b/Dockerfile
index 7e0651d..930a6df 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,9 +5,9 @@
 # 3) Test: docker run $USER/node-opencv node -e "console.log(require('opencv').version)"
 #
 # VERSION		0.2
-# DOCKER-VERSION	1.8.2
+# DOCKER-VERSION	8.1.2
 
-# update to 14.04, but lock versions at 12.04 for now
+# update to 14.04
 from	ubuntu:14.04
 run apt-get update -qq
 run apt-get install -y software-properties-common python-software-properties
diff --git a/Makefile b/Makefile
index bcacd40..9878379 100644
--- a/Makefile
+++ b/Makefile
@@ -1,14 +1,14 @@
 VERSION := $(shell node -e "console.log(require('./package.json').version)")
 
-.PHONY: default release smoke
-
 test:
 	npm test
+.PHONY: test
 
 smoke:
 	npm install --build-from-source
 	node smoke/smoketest.js
 	npm test
+.PHONY: smoke
 
 
 release:
@@ -32,3 +32,10 @@ release:
 
 	@echo "Publishing to NPM"
 	@npm publish
+.PHONY: release
+
+
+travis-build:
+	docker build -t peterbraden/node-opencv-ubuntu-12-04 -f test/Dockerfile-ubuntu-12-04 .
+	docker build -t peterbraden/node-opencv-ubuntu-14-04 -f test/Dockerfile-ubuntu-14-04 .
+.PHONY: travis-build
diff --git a/README.md b/README.md
index c538350..cedc471 100755
--- a/README.md
+++ b/README.md
@@ -148,7 +148,7 @@ detection. This can be used for face detection etc.
 mat.detectObject(haar_cascade_xml, opts, function(err, matches){})
 ```
 
-For convenience in face recognition, cv.FACE_CASCADE is a cascade that can be used for frontal face recognition.
+For convenience in face detection, cv.FACE_CASCADE is a cascade that can be used for frontal face detection.
 
 Also:
 
diff --git a/examples/salt.js b/examples/salt.js
index 737e834..25c9861 100755
--- a/examples/salt.js
+++ b/examples/salt.js
@@ -1,3 +1,4 @@
+/*
 var cv = require('../lib/opencv');
 
 cv.readImage("./files/mona.png", function(err, im) {
@@ -18,3 +19,4 @@ function salt(img, n) {
     img.set(y, x, 255);
   }
 }
+*/
diff --git a/package.json b/package.json
index b4c916e..226053a 100644
--- a/package.json
+++ b/package.json
@@ -35,7 +35,7 @@
     "url": "https://github.com/peterbraden/node-opencv.git"
   },
   "engines": {
-    "node": ">=0.10"
+    "node": ">=0.12"
   },
   "binary": {
     "module_name": "opencv",
diff --git a/src/FaceRecognizer.cc b/src/FaceRecognizer.cc
index 535a18c..3814d45 100644
--- a/src/FaceRecognizer.cc
+++ b/src/FaceRecognizer.cc
@@ -1,7 +1,7 @@
 #include "FaceRecognizer.h"
 #include "OpenCV.h"
 
-#if ((CV_MAJOR_VERSION >= 2) && (CV_MINOR_VERSION >=4))
+#if ((CV_MAJOR_VERSION >= 2) && (CV_MINOR_VERSION >=4) && (CV_SUBMINOR_VERSION>=4))
 
 #include "Matrix.h"
 #include <nan.h>
diff --git a/test/Dockerfile-ubuntu-12-04 b/test/Dockerfile-ubuntu-12-04
new file mode 100644
index 0000000..735625d
--- /dev/null
+++ b/test/Dockerfile-ubuntu-12-04
@@ -0,0 +1,13 @@
+# This is a dockerfile to test the build on ubuntu 12.04
+from	ubuntu:12.04
+run apt-get update -qq
+run apt-get install -y software-properties-common python-software-properties
+run add-apt-repository -y ppa:kubuntu-ppa/backports
+run apt-get update
+run apt-get install -y libcv-dev libcvaux-dev libhighgui-dev libopencv-dev
+run curl -sL https://deb.nodesource.com/setup | bash -
+run apt-get install -y nodejs
+WORKDIR /root/node-opencv
+add . /root/node-opencv
+run	npm install --unsafe-perm --build-from-source || cat npm-debug.log
+run make test
diff --git a/test/Dockerfile-ubuntu-14-04 b/test/Dockerfile-ubuntu-14-04
new file mode 100644
index 0000000..262a37d
--- /dev/null
+++ b/test/Dockerfile-ubuntu-14-04
@@ -0,0 +1,13 @@
+# This is a dockerfile to test the build on ubuntu 14.04
+from	ubuntu:14.04
+run apt-get update -qq
+run apt-get install -y software-properties-common python-software-properties
+run add-apt-repository -y ppa:kubuntu-ppa/backports
+run apt-get update
+run apt-get install -y libcv-dev libcvaux-dev libhighgui-dev libopencv-dev
+run curl -sL https://deb.nodesource.com/setup | bash -
+run apt-get install -y nodejs
+WORKDIR /root/node-opencv
+add . /root/node-opencv
+run	npm install --unsafe-perm --build-from-source || cat npm-debug.log
+run make test