diff --git a/requirements.txt b/requirements.txt
index e0b4bf4c4..33fc1e180 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,19 +1,19 @@
 # Add here external Python modules dependencies, one per line. Module names
 # should match https://pypi.python.org/pypi names. For the full spec or
 # dependency lines, see https://pip.readthedocs.org/en/1.1/requirements.html
 
 # Runtime dependencies
 django
 djangorestframework
-python-dateutil
 docutils
-pygments
-yaml
 file_magic
+pygments
+python-dateutil
+pyyaml
 
 #Doc dependencies
 sphinx
 sphinxcontrib-httpdomain
 
 # Test dependencies