diff --git a/requirements.txt b/requirements.txt
index 174ea22..230ae51 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ cycler==0.10.0
 Cython==0.29.10
 decorator==4.4.0
 docopt==0.6.2
-idna==2.8
+idna==3.7
 kiwisolver==1.1.0
 matplotlib==3.1.1
 mpmath==1.1.0