diff --git a/aws_lambda_powertools/utilities/feature_flags/schema.py b/aws_lambda_powertools/utilities/feature_flags/schema.py
index 48a1eb77129..a1c508f66f9 100644
--- a/aws_lambda_powertools/utilities/feature_flags/schema.py
+++ b/aws_lambda_powertools/utilities/feature_flags/schema.py
@@ -23,7 +23,7 @@
 HOUR_MIN_SEPARATOR = ":"
 
 
-class RuleAction(Enum):
+class RuleAction(str, Enum):
     EQUALS = "EQUALS"
     NOT_EQUALS = "NOT_EQUALS"
     KEY_GREATER_THAN_VALUE = "KEY_GREATER_THAN_VALUE"