diff --git a/requirements.txt b/requirements.txt
index e10741f..0eee932 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -68,7 +68,7 @@ h5py==2.7.0
 heapdict==1.0.0
 html5lib==1.0.1
 hyperlink==18.0.0
-idna==2.7
+idna==3.7
 imagesize==1.1.0
 incremental==17.5.0
 infinity==1.4