diff --git a/requirements.txt b/requirements.txt
index fd2170a85..545bab989 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,5 +16,4 @@ pathlib==1.0.1; python_version < "3.4"
 pytest>=4.0.0,<5.0.0
 pytest-timeout>=1.3.0,<2.0.0
 mock>=2.0.0,<3.0.0
-black==18.9b0
 flake8>=3.5.0,<3.6.0