Bump flake8 version to 3.8

This is necessary to support walrus operators.

1 files changed, 1 insertions, 1 deletions

diff --git a/Pipfile b/Pipfile
index 2d6b45aa9..4db8a238b 100644
--- a/Pipfile
+++ b/Pipfile
@@ -28,7 +28,7 @@ statsd = "~=3.3"
 
 [dev-packages]
 coverage = "~=5.0"
-flake8 = "~=3.7"
+flake8 = "~=3.8"
 flake8-annotations = "~=2.0"
 flake8-bugbear = "~=20.1"
 flake8-docstrings = "~=1.4"