diff --git a/pyproject.toml b/pyproject.toml
index 4d716f4c..5409d20e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -70,6 +70,7 @@ ignore = [
     "N818",    # exception name should end with Error — existing convention
     "F821",    # undefined name — false positives on forward-reference type hints
     "F822",    # undefined name in __all__ — lazy-loaded module attributes
+    "UP042",   # str+Enum → StrEnum — requires Python 3.11+ migration, do incrementally
 ]
 
 # Allow autofix for all rules