diff --git a/backend/requirements-dev.txt b/backend/requirements-dev.txt
index d67a19a4..ff037afa 100644
--- a/backend/requirements-dev.txt
+++ b/backend/requirements-dev.txt
@@ -1,4 +1,4 @@
 pylint>=2.1.1
-black==23.1.0
+black==18.9b0
 mypy
 pytest>=3.7.1
\ No newline at end of file