diff --git a/requirements.txt b/requirements.txt
index 724fcfe..6c941ef 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@ click==7.1.2
 cryptography==3.3.1
 cssselect==1.1.0
 cssutils==1.0.2
-dnspython==2.0.0
+dnspython==2.3.0
 Flask==1.1.2
 gunicorn==20.0.4
 itsdangerous==1.1.0