diff --git a/rest-service/requirements.txt b/rest-service/requirements.txt
index 62b3aeb661..4002fc82a1 100644
--- a/rest-service/requirements.txt
+++ b/rest-service/requirements.txt
@@ -57,7 +57,7 @@ distro==1.8.0
     # via
     #   cloudify-common
     #   cloudify-rest-service (setup.py)
-dnspython==2.4.2
+dnspython==2.6.0rc1
     # via email-validator
 email-validator==1.3.1
     # via cloudify-rest-service (setup.py)