diff --git a/requirements_test.txt b/requirements_test.txt
index a1f09f5..e6b6ad0 100644
--- a/requirements_test.txt
+++ b/requirements_test.txt
@@ -1,6 +1,6 @@
 black==19.10b0
 coverage==5.3
-flake8==3.8.3
+flake8==3.8.4
 flake8-docstrings==1.5.0
 pre-commit==2.6.0
 pylint==2.6.0