diff --git a/requirements_for_test.txt b/requirements_for_test.txt
index c4bf41fcb..543dd044f 100644
--- a/requirements_for_test.txt
+++ b/requirements_for_test.txt
@@ -6,7 +6,7 @@ pytest-mock==3.5.1
 pytest-xdist==2.2.1
 beautifulsoup4==4.9.3
 freezegun==1.1.0
-flake8==3.8.4
+flake8==3.9.0
 flake8-bugbear==21.3.1
 flake8-print==4.0.0
 requests-mock==1.8.0