diff --git a/docs/Filter.md b/docs/Filter.md
index ea4d8e7..98e215a 100644
--- a/docs/Filter.md
+++ b/docs/Filter.md
@@ -6,7 +6,7 @@ Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **field** | Option<**String**> | Required. Name of the field to use as the first operand in the filter expression. | [optional]
 **key** | Option<**String**> | If `field` is `tag`, this field is *required* to specify `key` inside the tags. | [optional]
-**value** | Option<**String**> | Constant value to use as the second operand in the filter expression. This value is *required* when the relation operator is a binary operator. | [optional]
+**value** | Option<**String**> | Constant value to use as the second operand in the filter expression. This value is *required* when the relation operator is a binary operator. For `in_array` and `not_in_array` relations, provide a comma-separated list of up to 20 values. | [optional]
 **hours_ago** | Option<**String**> | If `field` is session-related, this is *required* to specify the number of hours before or after the user's session. | [optional]
 **radius** | Option<**f32**> | If `field` is `location`, this will specify the radius in meters from a provided location point. Use with `lat` and `long`. | [optional]
 **lat** | Option<**f32**> | If `field` is `location`, this is *required* to specify the user's latitude. | [optional]
diff --git a/docs/FilterExpression.md b/docs/FilterExpression.md
index a142c1f..b3c3964 100644
--- a/docs/FilterExpression.md
+++ b/docs/FilterExpression.md
@@ -6,7 +6,7 @@ Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **field** | Option<**String**> | Required. Name of the field to use as the first operand in the filter expression. | [optional]
 **key** | Option<**String**> | If `field` is `tag`, this field is *required* to specify `key` inside the tags. | [optional]
-**value** | Option<**String**> | Constant value to use as the second operand in the filter expression. This value is *required* when the relation operator is a binary operator. | [optional]
+**value** | Option<**String**> | Constant value to use as the second operand in the filter expression. This value is *required* when the relation operator is a binary operator. For `in_array` and `not_in_array` relations, provide a comma-separated list of up to 20 values. | [optional]
 **hours_ago** | Option<**String**> | If `field` is session-related, this is *required* to specify the number of hours before or after the user's session. | [optional]
 **radius** | Option<**f32**> | If `field` is `location`, this will specify the radius in meters from a provided location point. Use with `lat` and `long`. | [optional]
 **lat** | Option<**f32**> | If `field` is `location`, this is *required* to specify the user's latitude. | [optional]
diff --git a/src/models/filter.rs b/src/models/filter.rs
index 30abfcd..6c01d21 100644
--- a/src/models/filter.rs
+++ b/src/models/filter.rs
@@ -19,7 +19,7 @@ pub struct Filter {
     /// If `field` is `tag`, this field is *required* to specify `key` inside the tags.
     #[serde(rename = "key", skip_serializing_if = "Option::is_none")]
     pub key: Option<String>,
-    /// Constant value to use as the second operand in the filter expression. This value is *required* when the relation operator is a binary operator.
+    /// Constant value to use as the second operand in the filter expression. This value is *required* when the relation operator is a binary operator. For `in_array` and `not_in_array` relations, provide a comma-separated list of up to 20 values.
     #[serde(rename = "value", skip_serializing_if = "Option::is_none")]
     pub value: Option<String>,
     /// If `field` is session-related, this is *required* to specify the number of hours before or after the user's session.
@@ -73,6 +73,10 @@ pub enum RelationType {
     TimeElapsedGt,
     #[serde(rename = "time_elapsed_lt")]
     TimeElapsedLt,
+    #[serde(rename = "in_array")]
+    InArray,
+    #[serde(rename = "not_in_array")]
+    NotInArray,
 }
 
 impl Default for RelationType {
diff --git a/src/models/filter_expression.rs b/src/models/filter_expression.rs
index d6727d0..36cbde3 100644
--- a/src/models/filter_expression.rs
+++ b/src/models/filter_expression.rs
@@ -19,7 +19,7 @@ pub struct FilterExpression {
     /// If `field` is `tag`, this field is *required* to specify `key` inside the tags.
     #[serde(rename = "key", skip_serializing_if = "Option::is_none")]
     pub key: Option<String>,
-    /// Constant value to use as the second operand in the filter expression. This value is *required* when the relation operator is a binary operator.
+    /// Constant value to use as the second operand in the filter expression. This value is *required* when the relation operator is a binary operator. For `in_array` and `not_in_array` relations, provide a comma-separated list of up to 20 values.
     #[serde(rename = "value", skip_serializing_if = "Option::is_none")]
     pub value: Option<String>,
     /// If `field` is session-related, this is *required* to specify the number of hours before or after the user's session.
@@ -77,6 +77,10 @@ pub enum RelationType {
     TimeElapsedGt,
     #[serde(rename = "time_elapsed_lt")]
     TimeElapsedLt,
+    #[serde(rename = "in_array")]
+    InArray,
+    #[serde(rename = "not_in_array")]
+    NotInArray,
 }
 
 impl Default for RelationType {