diff --git a/requirements-testing.txt b/requirements-testing.txt
index 31326362..d964b278 100644
--- a/requirements-testing.txt
+++ b/requirements-testing.txt
@@ -1,6 +1,6 @@
 python-coveralls==2.9.3
 coverage==5.5
-flake8==3.8.4
+flake8==3.9.0
 pytest==6.2.2
 pytest-cov==2.11.1
 autopep8==1.5.5