diff --git a/requirements.txt b/requirements.txt
index 9b2477c7..06ce4255 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ binaryornot==0.4.4
 
 # Code quality
 # ------------------------------------------------------------------------------
-black==21.4b2
+black==21.5b1
 isort==5.8.0
 flake8==3.9.1
 flake8-isort==4.0.0