diff --git a/components/lab-workspace-manager/backend/setup.cfg b/components/lab-workspace-manager/backend/setup.cfg
index 868f1fd..902ddfe 100644
--- a/components/lab-workspace-manager/backend/setup.cfg
+++ b/components/lab-workspace-manager/backend/setup.cfg
@@ -6,12 +6,15 @@ license_files = LICENSE
 universal = false
 
 [flake8]
-ignore =
-    E203,  # space before : (needed for how black formats slicing)
-    # E266,  # too many leading '#' for block comment
-    E501,  # line too long
-    E731,  # do not assign a lambda expression, use a def
-    W503,  # line break before binary operator
+extend-ignore =
+    # space before : (needed for how black formats slicing)
+    E203,
+    # line too long
+    E501,
+    # do not assign a lambda expression, use a def
+    E731,
+    # line break before binary operator
+    W503,
 max-line-length = 88
 # select = B,C,E,F,W,T4,B9
 # max-complexity = 18