diff --git a/requirements.txt b/requirements.txt
index 91c1f29..0759413 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,4 @@
 BeautifulSoup==3.2.1
 lxml==3.1beta1
 pyenchant==1.6.5
+pydns>=2.3.6