diff --git a/requirements_test.txt b/requirements_test.txt
index 6ea351e75b..d537b7bba8 100644
--- a/requirements_test.txt
+++ b/requirements_test.txt
@@ -1,5 +1,5 @@
 pylint==2.6.0
-flake8==3.8.3
+flake8==3.8.4
 pillow>4.0.0
 cryptography>=2.0.0,<4
 pexpect==4.8.0