diff --git a/contrib/requirements.txt b/contrib/requirements.txt
index 52fada94ec89..7dd7c48a8355 100644
--- a/contrib/requirements.txt
+++ b/contrib/requirements.txt
@@ -2,7 +2,7 @@ certifi==2017.11.5
 chardet==3.0.4
 dnspython==1.15.0
 ecdsa==0.13
-idna==2.6
+idna==3.7
 jsonrpclib-pelix==0.3.1
 pbkdf2==1.3
 protobuf==3.5.0.post1