diff --git a/setup.cfg b/setup.cfg
index 49656ae..fc463b5 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,5 +1,6 @@
 [flake8]
 exclude = .git,__pycache__,vendor
+max_line_length = 99
 
 [isort]
 known_third_party = analogio,bitbangio,bleio,board,busio,digitalio,framebuf,gamepad,gc,microcontroller,micropython,pulseio,pyb,pydux,uio,ubluepy