diff --git a/.flake8 b/.flake8
index 0fc72e64..4a0e68a4 100644
--- a/.flake8
+++ b/.flake8
@@ -1,5 +1,5 @@
 [flake8]
-select = I,C,F,E1,E2,E3
+select = I,C,F,E1,E2,E3,E4
 ignore = E266
 exclude =
     .git,
diff --git a/plugins/hub/sidetag_hub.py b/plugins/hub/sidetag_hub.py
index 92af1607..dd5f53c2 100644
--- a/plugins/hub/sidetag_hub.py
+++ b/plugins/hub/sidetag_hub.py
@@ -7,7 +7,7 @@ import koji
 from koji.context import context
 from koji.plugin import callback, export
 sys.path.insert(0, "/usr/share/koji-hub/")
-from kojihub import (
+from kojihub import (  # noqa: F402
     QueryProcessor,
     _create_build_target,
     _create_tag,