diff --git a/tox.ini b/tox.ini
index a527881..9cd7814 100644
--- a/tox.ini
+++ b/tox.ini
@@ -15,7 +15,7 @@ deps=nose
      configobj
      requests
      lxml
-     dnspython
+     dnspython3
      pyasn1
      pyasn1-modules