diff --git a/requirements_tests.txt b/requirements_tests.txt
index 7f7c8e9c0..fca59eb67 100644
--- a/requirements_tests.txt
+++ b/requirements_tests.txt
@@ -1,4 +1,4 @@
-black==20.8b1
+black==21.4b0
 codecov==2.1.11
 coverage==5.5
 flake8-docstrings==1.6.0