diff --git a/.travis.yml b/.travis.yml
index 2f45864..c055dce 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,8 +11,8 @@ before_install:
 
 # command to install dependencies
 install:
-  - if [[ $TRAVIS_PYTHON_VERSION == '2.7' ]]; then pip install --use-mirrors contextlib2 mock; fi
-  - if [[ $TRAVIS_PYTHON_VERSION == '3.3' ]]; then pip install --use-mirrors numpy; fi
+  - if [[ $TRAVIS_PYTHON_VERSION == '2.7' ]]; then pip install --use-mirrors lxml contextlib2 mock; fi
+  - if [[ $TRAVIS_PYTHON_VERSION == '3.3' ]]; then pip install --use-mirrors lxml numpy; fi
 
 # command to run tests
 script:
diff --git a/setup.py b/setup.py
index b1332d8..41deb1a 100644
--- a/setup.py
+++ b/setup.py
@@ -16,7 +16,7 @@ kwargs = {'name': 'Glymur',
           'license': 'MIT',
           'test_suite': 'glymur.test'}
 
-instllrqrs = ['numpy>=1.4.1']
+instllrqrs = ['lxml>=3.3', 'numpy>=1.4.1']
 if sys.hexversion < 0x03030000:
     instllrqrs.append('contextlib2>=0.4')
     instllrqrs.append('mock>=1.0.1')