diff --git a/requirements/requirements.txt b/requirements/requirements.txt
index c164ebb..bdc9a16 100644
--- a/requirements/requirements.txt
+++ b/requirements/requirements.txt
@@ -1,3 +1,4 @@
+dnspython==2.3.0
 docutils==0.19
 gunicorn==20.1.0
 ibge==0.0.5