diff --git a/aws-config-conformance-packs/Operational-Best-Practices-for-CIS-Top20.yaml b/aws-config-conformance-packs/Operational-Best-Practices-for-CIS-Top20.yaml
index ba40c98f..d5cf84a0 100644
--- a/aws-config-conformance-packs/Operational-Best-Practices-for-CIS-Top20.yaml
+++ b/aws-config-conformance-packs/Operational-Best-Practices-for-CIS-Top20.yaml
@@ -40,16 +40,16 @@ Parameters:
     Default: '24'
     Type: String
   IamPasswordPolicyParamRequireLowercaseCharacters:
-    Default: 'TRUE'
+    Default: 'true'
     Type: String
   IamPasswordPolicyParamRequireNumbers:
-    Default: 'TRUE'
+    Default: 'true'
     Type: String
   IamPasswordPolicyParamRequireSymbols:
-    Default: 'TRUE'
+    Default: 'true'
     Type: String
   IamPasswordPolicyParamRequireUppercaseCharacters:
-    Default: 'TRUE'
+    Default: 'true'
     Type: String
   IamUserUnusedCredentialsCheckParamMaxCredentialUsageAge:
     Default: '90'