diff --git a/requirements.txt b/requirements.txt
index e8535ce..7c83852 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,7 +16,7 @@ flake8==3.9.1
 identify==2.2.10
 idna==3.2
 iniconfig==1.1.1
-isort==5.8.0
+isort==5.9.1
 lazy-object-proxy==1.6.0
 mccabe==0.6.1
 mypy-extensions==0.4.3