diff --git a/requirements.txt b/requirements.txt
index 554c67a..2c5b3fd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,7 @@ docopt==0.6.2
 entrypoints==0.3
 filelock==3.4.2
 flake8==3.9.2
-idna==3.2
+idna==3.4
 importlib-metadata==4.8.1
 mccabe==0.6.1
 more-itertools==8.9.0