diff --git a/requirements-testing.txt b/requirements-testing.txt
index bebabc8b..5540d853 100644
--- a/requirements-testing.txt
+++ b/requirements-testing.txt
@@ -1,7 +1,7 @@
 wheel==0.36.2
 python-coveralls==2.9.3
 coverage==5.5
-flake8==3.9.0
+flake8==3.9.1
 pytest==6.2.3
 pytest-cov==2.11.1
 autopep8==1.5.6