diff --git a/requirements.txt b/requirements.txt
index 1fbc8d16..fd88434d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,7 +7,7 @@ binaryornot==0.4.4
 black==19.10b0
 isort==4.3.21
 flake8==3.8.3
-flake8-isort==3.0.1
+flake8-isort==4.0.0
 
 # Testing
 # ------------------------------------------------------------------------------