diff --git a/.travis.yml b/.travis.yml
index fb703b0..38393db 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,12 +6,13 @@ virtual_env:
 install:
   - pip install --upgrade pip
   - pip install -r requirements.txt
+  - pip install http://xmlsoft.org/sources/python/libxml2-python-2.6.21.tar.gz
   - pip install PyXmlSec --allow-external PyXMLSec --allow-insecure PyXMLSec
 script: 
   coverage run --source=pytrustnfe setup.py nosetests
 before_install:
   - sudo apt-get update -qq
-  - sudo apt-get install -qq libxml2-dev libxmlsec1-dev libxslt-dev
+  - sudo apt-get install -qq libxml2-dev libxmlsec1-dev libxslt-dev python-lxml
 after_success:
   coveralls
 
diff --git a/requirements.txt b/requirements.txt
index 3961f03..d3a5445 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,5 @@
 PyOpenSSL
+lxml
 nose
 mock
-coveralls
\ No newline at end of file
+coveralls