diff --git a/requirements.txt b/requirements.txt
index 351c2c07ae47a..a28088c94b867 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -52,6 +52,7 @@ pyowm>=2.2.1
 
 # XMPP Bindings (notify.xmpp)
 sleekxmpp>=1.3.1
+dnspython>=1.11.1
 
 # Blockchain (sensor.bitcoin)
 blockchain>=1.1.2