diff --git a/tox.ini b/tox.ini
index cae51e3..a527881 100644
--- a/tox.ini
+++ b/tox.ini
@@ -15,6 +15,9 @@ deps=nose
      configobj
      requests
      lxml
+     dnspython
+     pyasn1
+     pyasn1-modules
 
 commands=
   test: nosetests []  # substitute with tox' positional arguments