diff --git a/requirements.in b/requirements.in
index 7c588b1ba82a4cac6be32bf1b279cde2a7dbd978..190917c3f2cd61b19b54f3458d6a87a03cf88846 100644
--- a/requirements.in
+++ b/requirements.in
@@ -1,5 +1,6 @@
 ansible~=2.9.0
 defusedxml
+dnspython
 gimmecert~=0.5.0
 molecule~=2.22.0
 netaddr