diff --git a/policies/aws_s3_policies/aws_s3_bucket_policy_confused_deputy.py b/policies/aws_s3_policies/aws_s3_bucket_policy_confused_deputy.py
index c1e552f94..8d827f4f0 100644
--- a/policies/aws_s3_policies/aws_s3_bucket_policy_confused_deputy.py
+++ b/policies/aws_s3_policies/aws_s3_bucket_policy_confused_deputy.py
@@ -25,6 +25,6 @@ def policy(resource):
                 if isinstance(condition, dict):
                     flat_condition_keys.update(condition.keys())
             # Check if any required condition key is present
-            if not REQUIRED_CONDITIONS.intersection(flat_condition_keys):
+            if not {str.casefold(x) for x in REQUIRED_CONDITIONS} & {str.casefold(x) for x in flat_condition_keys}:
                 return False
     return True