diff --git a/backend/requirements.dev.txt b/backend/requirements.dev.txt
index 96a0034b..af59a871 100644
--- a/backend/requirements.dev.txt
+++ b/backend/requirements.dev.txt
@@ -2,7 +2,7 @@
 mypy==0.730
 mypy-extensions==0.4.2
 pylint==2.4.2
-flake8==3.7.8
+flake8==3.9.0
 flake8-commas==2.0.0
 flake8-docstrings==1.5.0
 flake8-logging-format==0.6.0