diff --git a/requirements.txt b/requirements.txt
index ae6b8c1..b63b25a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -14,7 +14,7 @@ flake8==3.7.9
 fonttools==4.12.1
 html2text==2020.1.16
 idna==2.9
-isort==4.3.21
+isort==5.9.3
 lazy-object-proxy==1.4.3
 mccabe==0.6.1
 more-itertools==8.2.0