diff --git a/src/main/kotlin/com/cloudcontactai/sdk/email/EmailModels.kt b/src/main/kotlin/com/cloudcontactai/sdk/email/EmailModels.kt
index e58be71..4d1e230 100644
--- a/src/main/kotlin/com/cloudcontactai/sdk/email/EmailModels.kt
+++ b/src/main/kotlin/com/cloudcontactai/sdk/email/EmailModels.kt
@@ -9,7 +9,7 @@ data class EmailAccount(
     @JsonProperty("lastName") val lastName: String,
     @JsonProperty("email") val email: String,
     @JsonProperty("customAccountId") val customAccountId: String? = null,
-    @JsonProperty("customFields") val customFields: Map<String, String> = emptyMap()
+    @JsonProperty("data") val customFields: Map<String, String> = emptyMap()
 )
 
 @JsonIgnoreProperties(ignoreUnknown = true)
diff --git a/src/main/kotlin/com/cloudcontactai/sdk/mms/MMSModels.kt b/src/main/kotlin/com/cloudcontactai/sdk/mms/MMSModels.kt
index f5ecb30..e6682e2 100644
--- a/src/main/kotlin/com/cloudcontactai/sdk/mms/MMSModels.kt
+++ b/src/main/kotlin/com/cloudcontactai/sdk/mms/MMSModels.kt
@@ -8,8 +8,11 @@ data class Account(
     val lastName: String,
     val phone: String
 ){
+    @JsonProperty("data")
     var customFields: Map<String, String> = emptyMap()
-    @JsonProperty("messageData") var customData: String? = null
+
+    @JsonProperty("messageData")
+    var customData: String? = null
 
     constructor(firstName: String, lastName: String, phone: String, customFields: Map<String, String>) : this(firstName, lastName, phone) {
         this.customFields = customFields
diff --git a/src/main/kotlin/com/cloudcontactai/sdk/sms/SMSModels.kt b/src/main/kotlin/com/cloudcontactai/sdk/sms/SMSModels.kt
index c694c06..3b058c5 100644
--- a/src/main/kotlin/com/cloudcontactai/sdk/sms/SMSModels.kt
+++ b/src/main/kotlin/com/cloudcontactai/sdk/sms/SMSModels.kt
@@ -8,7 +8,7 @@ data class Account(
     @JsonProperty("firstName") val firstName: String,
     @JsonProperty("lastName") val lastName: String,
     @JsonProperty("phone") val phone: String,
-    @JsonProperty("customFields") val customFields: Map<String, String> = emptyMap(),
+    @JsonProperty("data") val customFields: Map<String, String> = emptyMap(),
     @JsonProperty("messageData") val customData: String? = null
 )