diff --git a/Sources/CloudformationClient/AWSCloudformationClient.swift b/Sources/CloudformationClient/AWSCloudformationClient.swift
index 11954967..9d15ed79 100644
--- a/Sources/CloudformationClient/AWSCloudformationClient.swift
+++ b/Sources/CloudformationClient/AWSCloudformationClient.swift
@@ -4225,6 +4225,84 @@ public struct AWSCloudformationClient<InvocationReportingType: HTTPClientCoreInv
         }
     }
 
+    /**
+     Invokes the RollbackStack operation returning immediately and passing the response to a callback.
+
+     - Parameters:
+         - input: The validated RollbackStackInput object being passed to this operation.
+         - completion: The RollbackStackOutputForRollbackStack object or an error will be passed to this 
+           callback when the operation is complete. The RollbackStackOutputForRollbackStack
+           object will be validated before being returned to caller.
+           The possible errors are: tokenAlreadyExists.
+     */
+    public func rollbackStackAsync(
+            input: CloudformationModel.RollbackStackInput, 
+            completion: @escaping (Result<CloudformationModel.RollbackStackOutputForRollbackStack, CloudformationError>) -> ()) throws {
+        let handlerDelegate = AWSClientInvocationDelegate(
+                    credentialsProvider: credentialsProvider,
+                    awsRegion: awsRegion,
+                    service: service,
+                    target: target)
+        
+        let invocationContext = HTTPClientInvocationContext(reporting: self.invocationsReporting.rollbackStack,
+                                                            handlerDelegate: handlerDelegate)
+        let wrappedInput = RollbackStackOperationHTTPRequestInput(encodable: input)
+        
+        let requestInput = QueryWrapperHTTPRequestInput(
+            wrappedInput: wrappedInput,
+            action: CloudformationModelOperations.rollbackStack.rawValue,
+            version: apiVersion)
+
+        _ = try httpClient.executeOperationAsyncRetriableWithOutput(
+            endpointPath: "/",
+            httpMethod: .POST,
+            input: requestInput,
+            completion: completion,
+            invocationContext: invocationContext,
+            retryConfiguration: retryConfiguration,
+            retryOnError: retryOnErrorProvider)
+    }
+
+    /**
+     Invokes the RollbackStack operation waiting for the response before returning.
+
+     - Parameters:
+         - input: The validated RollbackStackInput object being passed to this operation.
+     - Returns: The RollbackStackOutputForRollbackStack object to be passed back from the caller of this operation.
+         Will be validated before being returned to caller.
+     - Throws: tokenAlreadyExists.
+     */
+    public func rollbackStackSync(
+            input: CloudformationModel.RollbackStackInput) throws -> CloudformationModel.RollbackStackOutputForRollbackStack {
+        let handlerDelegate = AWSClientInvocationDelegate(
+                    credentialsProvider: credentialsProvider,
+                    awsRegion: awsRegion,
+                    service: service,
+                    target: target)
+        
+        let invocationContext = HTTPClientInvocationContext(reporting: self.invocationsReporting.rollbackStack,
+                                                            handlerDelegate: handlerDelegate)
+        let wrappedInput = RollbackStackOperationHTTPRequestInput(encodable: input)
+        
+        let requestInput = QueryWrapperHTTPRequestInput(
+            wrappedInput: wrappedInput,
+            action: CloudformationModelOperations.rollbackStack.rawValue,
+            version: apiVersion)
+
+        do {
+            return try httpClient.executeSyncRetriableWithOutput(
+                endpointPath: "/",
+                httpMethod: .POST,
+                input: requestInput,
+                invocationContext: invocationContext,
+                retryConfiguration: retryConfiguration,
+                retryOnError: retryOnErrorProvider)
+        } catch {
+            let typedError: CloudformationError = error.asTypedError()
+            throw typedError
+        }
+    }
+
     /**
      Invokes the SetStackPolicy operation returning immediately and passing the response to a callback.
 
diff --git a/Sources/CloudformationClient/CloudformationClientProtocol.swift b/Sources/CloudformationClient/CloudformationClientProtocol.swift
index 8d9b6ef4..4fa5125c 100644
--- a/Sources/CloudformationClient/CloudformationClientProtocol.swift
+++ b/Sources/CloudformationClient/CloudformationClientProtocol.swift
@@ -294,6 +294,11 @@ public protocol CloudformationClientProtocol {
     typealias RegisterTypeAsyncType = (
             _ input: CloudformationModel.RegisterTypeInput, 
             _ completion: @escaping (Result<CloudformationModel.RegisterTypeOutputForRegisterType, CloudformationError>) -> ()) throws -> ()
+    typealias RollbackStackSyncType = (
+            _ input: CloudformationModel.RollbackStackInput) throws -> CloudformationModel.RollbackStackOutputForRollbackStack
+    typealias RollbackStackAsyncType = (
+            _ input: CloudformationModel.RollbackStackInput, 
+            _ completion: @escaping (Result<CloudformationModel.RollbackStackOutputForRollbackStack, CloudformationError>) -> ()) throws -> ()
     typealias SetStackPolicySyncType = (
             _ input: CloudformationModel.SetStackPolicyInput) throws -> ()
     typealias SetStackPolicyAsyncType = (
@@ -1688,6 +1693,32 @@ public protocol CloudformationClientProtocol {
     func registerTypeSync(
             input: CloudformationModel.RegisterTypeInput) throws -> CloudformationModel.RegisterTypeOutputForRegisterType
 
+    /**
+     Invokes the RollbackStack operation returning immediately and passing the response to a callback.
+
+     - Parameters:
+         - input: The validated RollbackStackInput object being passed to this operation.
+         - completion: The RollbackStackOutputForRollbackStack object or an error will be passed to this 
+           callback when the operation is complete. The RollbackStackOutputForRollbackStack
+           object will be validated before being returned to caller.
+           The possible errors are: tokenAlreadyExists.
+     */
+    func rollbackStackAsync(
+            input: CloudformationModel.RollbackStackInput, 
+            completion: @escaping (Result<CloudformationModel.RollbackStackOutputForRollbackStack, CloudformationError>) -> ()) throws
+
+    /**
+     Invokes the RollbackStack operation waiting for the response before returning.
+
+     - Parameters:
+         - input: The validated RollbackStackInput object being passed to this operation.
+     - Returns: The RollbackStackOutputForRollbackStack object to be passed back from the caller of this operation.
+         Will be validated before being returned to caller.
+     - Throws: tokenAlreadyExists.
+     */
+    func rollbackStackSync(
+            input: CloudformationModel.RollbackStackInput) throws -> CloudformationModel.RollbackStackOutputForRollbackStack
+
     /**
      Invokes the SetStackPolicy operation returning immediately and passing the response to a callback.
 
diff --git a/Sources/CloudformationClient/CloudformationInvocationsReporting.swift b/Sources/CloudformationClient/CloudformationInvocationsReporting.swift
index b10f7573..c92bde90 100644
--- a/Sources/CloudformationClient/CloudformationInvocationsReporting.swift
+++ b/Sources/CloudformationClient/CloudformationInvocationsReporting.swift
@@ -82,6 +82,7 @@ public struct CloudformationInvocationsReporting<InvocationReportingType: HTTPCl
     public let recordHandlerProgress: SmokeAWSHTTPClientInvocationReporting<InvocationReportingType>
     public let registerPublisher: SmokeAWSHTTPClientInvocationReporting<InvocationReportingType>
     public let registerType: SmokeAWSHTTPClientInvocationReporting<InvocationReportingType>
+    public let rollbackStack: SmokeAWSHTTPClientInvocationReporting<InvocationReportingType>
     public let setStackPolicy: SmokeAWSHTTPClientInvocationReporting<InvocationReportingType>
     public let setTypeConfiguration: SmokeAWSHTTPClientInvocationReporting<InvocationReportingType>
     public let setTypeDefaultVersion: SmokeAWSHTTPClientInvocationReporting<InvocationReportingType>
@@ -201,6 +202,8 @@ public struct CloudformationInvocationsReporting<InvocationReportingType: HTTPCl
             smokeAWSOperationReporting: operationsReporting.registerPublisher)
         self.registerType = SmokeAWSHTTPClientInvocationReporting(smokeAWSInvocationReporting: reporting,
             smokeAWSOperationReporting: operationsReporting.registerType)
+        self.rollbackStack = SmokeAWSHTTPClientInvocationReporting(smokeAWSInvocationReporting: reporting,
+            smokeAWSOperationReporting: operationsReporting.rollbackStack)
         self.setStackPolicy = SmokeAWSHTTPClientInvocationReporting(smokeAWSInvocationReporting: reporting,
             smokeAWSOperationReporting: operationsReporting.setStackPolicy)
         self.setTypeConfiguration = SmokeAWSHTTPClientInvocationReporting(smokeAWSInvocationReporting: reporting,
diff --git a/Sources/CloudformationClient/CloudformationOperationsClientInput.swift b/Sources/CloudformationClient/CloudformationOperationsClientInput.swift
index 6c6c99b4..6890d12f 100644
--- a/Sources/CloudformationClient/CloudformationOperationsClientInput.swift
+++ b/Sources/CloudformationClient/CloudformationOperationsClientInput.swift
@@ -289,6 +289,11 @@ public typealias RegisterPublisherOperationHTTPRequestInput = QueryHTTPRequestIn
  */
 public typealias RegisterTypeOperationHTTPRequestInput = QueryHTTPRequestInput
 
+/**
+ Type to handle the input to the RollbackStack operation in a HTTP client.
+ */
+public typealias RollbackStackOperationHTTPRequestInput = QueryHTTPRequestInput
+
 /**
  Type to handle the input to the SetStackPolicy operation in a HTTP client.
  */
diff --git a/Sources/CloudformationClient/CloudformationOperationsClientOutput.swift b/Sources/CloudformationClient/CloudformationOperationsClientOutput.swift
index edc3ed36..e6d99977 100644
--- a/Sources/CloudformationClient/CloudformationOperationsClientOutput.swift
+++ b/Sources/CloudformationClient/CloudformationOperationsClientOutput.swift
@@ -687,6 +687,19 @@ extension RegisterTypeOutputForRegisterType: HTTPResponseOutputProtocol {
     }
 }
 
+/**
+ Type to handle the output from the RollbackStack operation in a HTTP client.
+ */
+extension RollbackStackOutputForRollbackStack: HTTPResponseOutputProtocol {
+    public typealias BodyType = RollbackStackOutputForRollbackStack
+    public typealias HeadersType = RollbackStackOutputForRollbackStack
+
+    public static func compose(bodyDecodableProvider: () throws -> BodyType,
+                               headersDecodableProvider: () throws -> HeadersType) throws -> RollbackStackOutputForRollbackStack {
+        return try bodyDecodableProvider()
+    }
+}
+
 /**
  Type to handle the output from the SetTypeConfiguration operation in a HTTP client.
  */
diff --git a/Sources/CloudformationClient/CloudformationOperationsReporting.swift b/Sources/CloudformationClient/CloudformationOperationsReporting.swift
index cba9ed5a..b2dff3cd 100644
--- a/Sources/CloudformationClient/CloudformationOperationsReporting.swift
+++ b/Sources/CloudformationClient/CloudformationOperationsReporting.swift
@@ -81,6 +81,7 @@ public struct CloudformationOperationsReporting {
     public let recordHandlerProgress: StandardSmokeAWSOperationReporting<CloudformationModelOperations>
     public let registerPublisher: StandardSmokeAWSOperationReporting<CloudformationModelOperations>
     public let registerType: StandardSmokeAWSOperationReporting<CloudformationModelOperations>
+    public let rollbackStack: StandardSmokeAWSOperationReporting<CloudformationModelOperations>
     public let setStackPolicy: StandardSmokeAWSOperationReporting<CloudformationModelOperations>
     public let setTypeConfiguration: StandardSmokeAWSOperationReporting<CloudformationModelOperations>
     public let setTypeDefaultVersion: StandardSmokeAWSOperationReporting<CloudformationModelOperations>
@@ -200,6 +201,8 @@ public struct CloudformationOperationsReporting {
             clientName: clientName, operation: .registerPublisher, configuration: reportingConfiguration)
         self.registerType = StandardSmokeAWSOperationReporting(
             clientName: clientName, operation: .registerType, configuration: reportingConfiguration)
+        self.rollbackStack = StandardSmokeAWSOperationReporting(
+            clientName: clientName, operation: .rollbackStack, configuration: reportingConfiguration)
         self.setStackPolicy = StandardSmokeAWSOperationReporting(
             clientName: clientName, operation: .setStackPolicy, configuration: reportingConfiguration)
         self.setTypeConfiguration = StandardSmokeAWSOperationReporting(
diff --git a/Sources/CloudformationClient/MockCloudformationClient.swift b/Sources/CloudformationClient/MockCloudformationClient.swift
index 0f3281a1..23c56cf3 100644
--- a/Sources/CloudformationClient/MockCloudformationClient.swift
+++ b/Sources/CloudformationClient/MockCloudformationClient.swift
@@ -135,6 +135,8 @@ public struct MockCloudformationClient: CloudformationClientProtocol {
     let registerPublisherSyncOverride: RegisterPublisherSyncType?
     let registerTypeAsyncOverride: RegisterTypeAsyncType?
     let registerTypeSyncOverride: RegisterTypeSyncType?
+    let rollbackStackAsyncOverride: RollbackStackAsyncType?
+    let rollbackStackSyncOverride: RollbackStackSyncType?
     let setStackPolicyAsyncOverride: SetStackPolicyAsyncType?
     let setStackPolicySyncOverride: SetStackPolicySyncType?
     let setTypeConfigurationAsyncOverride: SetTypeConfigurationAsyncType?
@@ -269,6 +271,8 @@ public struct MockCloudformationClient: CloudformationClientProtocol {
             registerPublisherSync: RegisterPublisherSyncType? = nil,
             registerTypeAsync: RegisterTypeAsyncType? = nil,
             registerTypeSync: RegisterTypeSyncType? = nil,
+            rollbackStackAsync: RollbackStackAsyncType? = nil,
+            rollbackStackSync: RollbackStackSyncType? = nil,
             setStackPolicyAsync: SetStackPolicyAsyncType? = nil,
             setStackPolicySync: SetStackPolicySyncType? = nil,
             setTypeConfigurationAsync: SetTypeConfigurationAsyncType? = nil,
@@ -397,6 +401,8 @@ public struct MockCloudformationClient: CloudformationClientProtocol {
         self.registerPublisherSyncOverride = registerPublisherSync
         self.registerTypeAsyncOverride = registerTypeAsync
         self.registerTypeSyncOverride = registerTypeSync
+        self.rollbackStackAsyncOverride = rollbackStackAsync
+        self.rollbackStackSyncOverride = rollbackStackSync
         self.setStackPolicyAsyncOverride = setStackPolicyAsync
         self.setStackPolicySyncOverride = setStackPolicySync
         self.setTypeConfigurationAsyncOverride = setTypeConfigurationAsync
@@ -2495,6 +2501,46 @@ public struct MockCloudformationClient: CloudformationClientProtocol {
         return RegisterTypeOutputForRegisterType.__default
     }
 
+    /**
+     Invokes the RollbackStack operation returning immediately and passing the response to a callback.
+
+     - Parameters:
+         - input: The validated RollbackStackInput object being passed to this operation.
+         - completion: The RollbackStackOutputForRollbackStack object or an error will be passed to this 
+           callback when the operation is complete. The RollbackStackOutputForRollbackStack
+           object will be validated before being returned to caller.
+           The possible errors are: tokenAlreadyExists.
+     */
+    public func rollbackStackAsync(
+            input: CloudformationModel.RollbackStackInput, 
+            completion: @escaping (Result<CloudformationModel.RollbackStackOutputForRollbackStack, CloudformationError>) -> ()) throws {
+        if let rollbackStackAsyncOverride = rollbackStackAsyncOverride {
+            return try rollbackStackAsyncOverride(input, completion)
+        }
+
+        let result = RollbackStackOutputForRollbackStack.__default
+        
+        completion(.success(result))
+    }
+
+    /**
+     Invokes the RollbackStack operation waiting for the response before returning.
+
+     - Parameters:
+         - input: The validated RollbackStackInput object being passed to this operation.
+     - Returns: The RollbackStackOutputForRollbackStack object to be passed back from the caller of this operation.
+         Will be validated before being returned to caller.
+     - Throws: tokenAlreadyExists.
+     */
+    public func rollbackStackSync(
+            input: CloudformationModel.RollbackStackInput) throws -> CloudformationModel.RollbackStackOutputForRollbackStack {
+        if let rollbackStackSyncOverride = rollbackStackSyncOverride {
+            return try rollbackStackSyncOverride(input)
+        }
+
+        return RollbackStackOutputForRollbackStack.__default
+    }
+
     /**
      Invokes the SetStackPolicy operation returning immediately and passing the response to a callback.
 
diff --git a/Sources/CloudformationClient/ThrowingCloudformationClient.swift b/Sources/CloudformationClient/ThrowingCloudformationClient.swift
index a2ac8318..51ccdc0a 100644
--- a/Sources/CloudformationClient/ThrowingCloudformationClient.swift
+++ b/Sources/CloudformationClient/ThrowingCloudformationClient.swift
@@ -136,6 +136,8 @@ public struct ThrowingCloudformationClient: CloudformationClientProtocol {
     let registerPublisherSyncOverride: RegisterPublisherSyncType?
     let registerTypeAsyncOverride: RegisterTypeAsyncType?
     let registerTypeSyncOverride: RegisterTypeSyncType?
+    let rollbackStackAsyncOverride: RollbackStackAsyncType?
+    let rollbackStackSyncOverride: RollbackStackSyncType?
     let setStackPolicyAsyncOverride: SetStackPolicyAsyncType?
     let setStackPolicySyncOverride: SetStackPolicySyncType?
     let setTypeConfigurationAsyncOverride: SetTypeConfigurationAsyncType?
@@ -270,6 +272,8 @@ public struct ThrowingCloudformationClient: CloudformationClientProtocol {
             registerPublisherSync: RegisterPublisherSyncType? = nil,
             registerTypeAsync: RegisterTypeAsyncType? = nil,
             registerTypeSync: RegisterTypeSyncType? = nil,
+            rollbackStackAsync: RollbackStackAsyncType? = nil,
+            rollbackStackSync: RollbackStackSyncType? = nil,
             setStackPolicyAsync: SetStackPolicyAsyncType? = nil,
             setStackPolicySync: SetStackPolicySyncType? = nil,
             setTypeConfigurationAsync: SetTypeConfigurationAsyncType? = nil,
@@ -399,6 +403,8 @@ public struct ThrowingCloudformationClient: CloudformationClientProtocol {
         self.registerPublisherSyncOverride = registerPublisherSync
         self.registerTypeAsyncOverride = registerTypeAsync
         self.registerTypeSyncOverride = registerTypeSync
+        self.rollbackStackAsyncOverride = rollbackStackAsync
+        self.rollbackStackSyncOverride = rollbackStackSync
         self.setStackPolicyAsyncOverride = setStackPolicyAsync
         self.setStackPolicySyncOverride = setStackPolicySync
         self.setTypeConfigurationAsyncOverride = setTypeConfigurationAsync
@@ -2397,6 +2403,44 @@ public struct ThrowingCloudformationClient: CloudformationClientProtocol {
         throw error
     }
 
+    /**
+     Invokes the RollbackStack operation returning immediately and passing the response to a callback.
+
+     - Parameters:
+         - input: The validated RollbackStackInput object being passed to this operation.
+         - completion: The RollbackStackOutputForRollbackStack object or an error will be passed to this 
+           callback when the operation is complete. The RollbackStackOutputForRollbackStack
+           object will be validated before being returned to caller.
+           The possible errors are: tokenAlreadyExists.
+     */
+    public func rollbackStackAsync(
+            input: CloudformationModel.RollbackStackInput, 
+            completion: @escaping (Result<CloudformationModel.RollbackStackOutputForRollbackStack, CloudformationError>) -> ()) throws {
+        if let rollbackStackAsyncOverride = rollbackStackAsyncOverride {
+            return try rollbackStackAsyncOverride(input, completion)
+        }
+
+        completion(.failure(error))
+    }
+
+    /**
+     Invokes the RollbackStack operation waiting for the response before returning.
+
+     - Parameters:
+         - input: The validated RollbackStackInput object being passed to this operation.
+     - Returns: The RollbackStackOutputForRollbackStack object to be passed back from the caller of this operation.
+         Will be validated before being returned to caller.
+     - Throws: tokenAlreadyExists.
+     */
+    public func rollbackStackSync(
+            input: CloudformationModel.RollbackStackInput) throws -> CloudformationModel.RollbackStackOutputForRollbackStack {
+        if let rollbackStackSyncOverride = rollbackStackSyncOverride {
+            return try rollbackStackSyncOverride(input)
+        }
+
+        throw error
+    }
+
     /**
      Invokes the SetStackPolicy operation returning immediately and passing the response to a callback.
 
diff --git a/Sources/CloudformationModel/CloudformationModelDefaultInstances.swift b/Sources/CloudformationModel/CloudformationModelDefaultInstances.swift
index e662ce8c..73518ff3 100644
--- a/Sources/CloudformationModel/CloudformationModelDefaultInstances.swift
+++ b/Sources/CloudformationModel/CloudformationModelDefaultInstances.swift
@@ -1450,6 +1450,7 @@ public extension ExecuteChangeSetInput {
         let defaultInstance = CloudformationModel.ExecuteChangeSetInput(
             changeSetName: "0",
             clientRequestToken: nil,
+            disableRollback: nil,
             stackName: nil)
 
         return defaultInstance
@@ -2623,6 +2624,44 @@ public extension RollbackConfiguration {
     }()
 }
 
+public extension RollbackStackInput {
+    /**
+     Default instance of the RollbackStackInput structure.
+     */
+    static let __default: CloudformationModel.RollbackStackInput = {
+        let defaultInstance = CloudformationModel.RollbackStackInput(
+            clientRequestToken: nil,
+            roleARN: nil,
+            stackName: "0")
+
+        return defaultInstance
+    }()
+}
+
+public extension RollbackStackOutput {
+    /**
+     Default instance of the RollbackStackOutput structure.
+     */
+    static let __default: CloudformationModel.RollbackStackOutput = {
+        let defaultInstance = CloudformationModel.RollbackStackOutput(
+            stackId: nil)
+
+        return defaultInstance
+    }()
+}
+
+public extension RollbackStackOutputForRollbackStack {
+    /**
+     Default instance of the RollbackStackOutputForRollbackStack structure.
+     */
+    static let __default: CloudformationModel.RollbackStackOutputForRollbackStack = {
+        let defaultInstance = CloudformationModel.RollbackStackOutputForRollbackStack(
+            rollbackStackResult: RollbackStackOutput.__default)
+
+        return defaultInstance
+    }()
+}
+
 public extension RollbackTrigger {
     /**
      Default instance of the RollbackTrigger structure.
@@ -3455,6 +3494,7 @@ public extension UpdateStackInput {
         let defaultInstance = CloudformationModel.UpdateStackInput(
             capabilities: nil,
             clientRequestToken: nil,
+            disableRollback: nil,
             notificationARNs: nil,
             parameters: nil,
             resourceTypes: nil,
diff --git a/Sources/CloudformationModel/CloudformationModelOperations.swift b/Sources/CloudformationModel/CloudformationModelOperations.swift
index 30a3a749..c2488d23 100644
--- a/Sources/CloudformationModel/CloudformationModelOperations.swift
+++ b/Sources/CloudformationModel/CloudformationModelOperations.swift
@@ -79,6 +79,7 @@ public enum CloudformationModelOperations: String, Hashable, CustomStringConvert
     case recordHandlerProgress = "RecordHandlerProgress"
     case registerPublisher = "RegisterPublisher"
     case registerType = "RegisterType"
+    case rollbackStack = "RollbackStack"
     case setStackPolicy = "SetStackPolicy"
     case setTypeConfiguration = "SetTypeConfiguration"
     case setTypeDefaultVersion = "SetTypeDefaultVersion"
@@ -203,6 +204,8 @@ public enum CloudformationModelOperations: String, Hashable, CustomStringConvert
             return "/"
         case .registerType:
             return "/"
+        case .rollbackStack:
+            return "/"
         case .setStackPolicy:
             return "/"
         case .setTypeConfiguration:
diff --git a/Sources/CloudformationModel/CloudformationModelStructures.swift b/Sources/CloudformationModel/CloudformationModelStructures.swift
index 04c6deb1..94479227 100644
--- a/Sources/CloudformationModel/CloudformationModelStructures.swift
+++ b/Sources/CloudformationModel/CloudformationModelStructures.swift
@@ -2462,19 +2462,23 @@ public struct EstimateTemplateCostOutputForEstimateTemplateCost: Codable, Equata
 public struct ExecuteChangeSetInput: Codable, Equatable {
     public var changeSetName: ChangeSetNameOrId
     public var clientRequestToken: ClientRequestToken?
+    public var disableRollback: DisableRollback?
     public var stackName: StackNameOrId?
 
     public init(changeSetName: ChangeSetNameOrId,
                 clientRequestToken: ClientRequestToken? = nil,
+                disableRollback: DisableRollback? = nil,
                 stackName: StackNameOrId? = nil) {
         self.changeSetName = changeSetName
         self.clientRequestToken = clientRequestToken
+        self.disableRollback = disableRollback
         self.stackName = stackName
     }
 
     enum CodingKeys: String, CodingKey {
         case changeSetName = "ChangeSetName"
         case clientRequestToken = "ClientRequestToken"
+        case disableRollback = "DisableRollback"
         case stackName = "StackName"
     }
 
@@ -4333,6 +4337,63 @@ public struct RollbackConfiguration: Codable, Equatable {
     }
 }
 
+public struct RollbackStackInput: Codable, Equatable {
+    public var clientRequestToken: ClientRequestToken?
+    public var roleARN: RoleARN?
+    public var stackName: StackNameOrId
+
+    public init(clientRequestToken: ClientRequestToken? = nil,
+                roleARN: RoleARN? = nil,
+                stackName: StackNameOrId) {
+        self.clientRequestToken = clientRequestToken
+        self.roleARN = roleARN
+        self.stackName = stackName
+    }
+
+    enum CodingKeys: String, CodingKey {
+        case clientRequestToken = "ClientRequestToken"
+        case roleARN = "RoleARN"
+        case stackName = "StackName"
+    }
+
+    public func validate() throws {
+        try clientRequestToken?.validateAsClientRequestToken()
+        try roleARN?.validateAsRoleARN()
+        try stackName.validateAsStackNameOrId()
+    }
+}
+
+public struct RollbackStackOutput: Codable, Equatable {
+    public var stackId: StackId?
+
+    public init(stackId: StackId? = nil) {
+        self.stackId = stackId
+    }
+
+    enum CodingKeys: String, CodingKey {
+        case stackId = "StackId"
+    }
+
+    public func validate() throws {
+    }
+}
+
+public struct RollbackStackOutputForRollbackStack: Codable, Equatable {
+    public var rollbackStackResult: RollbackStackOutput
+
+    public init(rollbackStackResult: RollbackStackOutput) {
+        self.rollbackStackResult = rollbackStackResult
+    }
+
+    enum CodingKeys: String, CodingKey {
+        case rollbackStackResult = "RollbackStackResult"
+    }
+
+    public func validate() throws {
+        try rollbackStackResult.validate()
+    }
+}
+
 public struct RollbackTrigger: Codable, Equatable {
     public var arn: Arn
     public var type: Type
@@ -6009,6 +6070,7 @@ public struct TypeVersionSummary: Codable, Equatable {
 public struct UpdateStackInput: Codable, Equatable {
     public var capabilities: Capabilities?
     public var clientRequestToken: ClientRequestToken?
+    public var disableRollback: DisableRollback?
     public var notificationARNs: NotificationARNs?
     public var parameters: Parameters?
     public var resourceTypes: ResourceTypes?
@@ -6026,6 +6088,7 @@ public struct UpdateStackInput: Codable, Equatable {
 
     public init(capabilities: Capabilities? = nil,
                 clientRequestToken: ClientRequestToken? = nil,
+                disableRollback: DisableRollback? = nil,
                 notificationARNs: NotificationARNs? = nil,
                 parameters: Parameters? = nil,
                 resourceTypes: ResourceTypes? = nil,
@@ -6042,6 +6105,7 @@ public struct UpdateStackInput: Codable, Equatable {
                 usePreviousTemplate: UsePreviousTemplate? = nil) {
         self.capabilities = capabilities
         self.clientRequestToken = clientRequestToken
+        self.disableRollback = disableRollback
         self.notificationARNs = notificationARNs
         self.parameters = parameters
         self.resourceTypes = resourceTypes
@@ -6061,6 +6125,7 @@ public struct UpdateStackInput: Codable, Equatable {
     enum CodingKeys: String, CodingKey {
         case capabilities = "Capabilities"
         case clientRequestToken = "ClientRequestToken"
+        case disableRollback = "DisableRollback"
         case notificationARNs = "NotificationARNs"
         case parameters = "Parameters"
         case resourceTypes = "ResourceTypes"
diff --git a/Sources/CloudformationModel/CloudformationModelTypes.swift b/Sources/CloudformationModel/CloudformationModelTypes.swift
index 434545d3..41238286 100644
--- a/Sources/CloudformationModel/CloudformationModelTypes.swift
+++ b/Sources/CloudformationModel/CloudformationModelTypes.swift
@@ -998,9 +998,15 @@ public enum ResourceStatus: String, Codable, CustomStringConvertible {
     case importRollbackComplete = "IMPORT_ROLLBACK_COMPLETE"
     case importRollbackFailed = "IMPORT_ROLLBACK_FAILED"
     case importRollbackInProgress = "IMPORT_ROLLBACK_IN_PROGRESS"
+    case rollbackComplete = "ROLLBACK_COMPLETE"
+    case rollbackFailed = "ROLLBACK_FAILED"
+    case rollbackInProgress = "ROLLBACK_IN_PROGRESS"
     case updateComplete = "UPDATE_COMPLETE"
     case updateFailed = "UPDATE_FAILED"
     case updateInProgress = "UPDATE_IN_PROGRESS"
+    case updateRollbackComplete = "UPDATE_ROLLBACK_COMPLETE"
+    case updateRollbackFailed = "UPDATE_ROLLBACK_FAILED"
+    case updateRollbackInProgress = "UPDATE_ROLLBACK_IN_PROGRESS"
 
     public var description: String {
         return rawValue
@@ -1425,6 +1431,7 @@ public enum StackStatus: String, Codable, CustomStringConvertible {
     case rollbackInProgress = "ROLLBACK_IN_PROGRESS"
     case updateComplete = "UPDATE_COMPLETE"
     case updateCompleteCleanupInProgress = "UPDATE_COMPLETE_CLEANUP_IN_PROGRESS"
+    case updateFailed = "UPDATE_FAILED"
     case updateInProgress = "UPDATE_IN_PROGRESS"
     case updateRollbackComplete = "UPDATE_ROLLBACK_COMPLETE"
     case updateRollbackCompleteCleanupInProgress = "UPDATE_ROLLBACK_COMPLETE_CLEANUP_IN_PROGRESS"
diff --git a/Sources/ElasticComputeCloudModel/ElasticComputeCloudModelDefaultInstances.swift b/Sources/ElasticComputeCloudModel/ElasticComputeCloudModelDefaultInstances.swift
index e956baf5..c2befe20 100644
--- a/Sources/ElasticComputeCloudModel/ElasticComputeCloudModelDefaultInstances.swift
+++ b/Sources/ElasticComputeCloudModel/ElasticComputeCloudModelDefaultInstances.swift
@@ -12233,6 +12233,7 @@ public extension ImportImageRequest {
     static let __default: ElasticComputeCloudModel.ImportImageRequest = {
         let defaultInstance = ElasticComputeCloudModel.ImportImageRequest(
             architecture: nil,
+            bootMode: nil,
             clientData: nil,
             clientToken: nil,
             description: nil,
@@ -12286,6 +12287,7 @@ public extension ImportImageTask {
     static let __default: ElasticComputeCloudModel.ImportImageTask = {
         let defaultInstance = ElasticComputeCloudModel.ImportImageTask(
             architecture: nil,
+            bootMode: nil,
             description: nil,
             encrypted: nil,
             hypervisor: nil,
@@ -12904,6 +12906,7 @@ public extension InstanceMetadataOptionsRequest {
     static let __default: ElasticComputeCloudModel.InstanceMetadataOptionsRequest = {
         let defaultInstance = ElasticComputeCloudModel.InstanceMetadataOptionsRequest(
             httpEndpoint: nil,
+            httpProtocolIpv6: nil,
             httpPutResponseHopLimit: nil,
             httpTokens: nil)
 
@@ -12918,6 +12921,7 @@ public extension InstanceMetadataOptionsResponse {
     static let __default: ElasticComputeCloudModel.InstanceMetadataOptionsResponse = {
         let defaultInstance = ElasticComputeCloudModel.InstanceMetadataOptionsResponse(
             httpEndpoint: nil,
+            httpProtocolIpv6: nil,
             httpPutResponseHopLimit: nil,
             httpTokens: nil,
             state: nil)
@@ -14786,6 +14790,7 @@ public extension ModifyInstanceMetadataOptionsRequest {
         let defaultInstance = ElasticComputeCloudModel.ModifyInstanceMetadataOptionsRequest(
             dryRun: nil,
             httpEndpoint: nil,
+            httpProtocolIpv6: nil,
             httpPutResponseHopLimit: nil,
             httpTokens: nil,
             instanceId: "value")
@@ -14874,6 +14879,7 @@ public extension ModifyManagedPrefixListRequest {
             addEntries: nil,
             currentVersion: nil,
             dryRun: nil,
+            maxEntries: nil,
             prefixListId: "value",
             prefixListName: nil,
             removeEntries: nil)
@@ -15797,6 +15803,7 @@ public extension NetworkInfo {
             efaInfo: nil,
             efaSupported: nil,
             enaSupport: nil,
+            encryptionInTransitSupported: nil,
             ipv4AddressesPerInterface: nil,
             ipv6AddressesPerInterface: nil,
             ipv6Supported: nil,
diff --git a/Sources/ElasticComputeCloudModel/ElasticComputeCloudModelStructures.swift b/Sources/ElasticComputeCloudModel/ElasticComputeCloudModelStructures.swift
index 1cd9e30f..feeabdb2 100644
--- a/Sources/ElasticComputeCloudModel/ElasticComputeCloudModelStructures.swift
+++ b/Sources/ElasticComputeCloudModel/ElasticComputeCloudModelStructures.swift
@@ -20984,6 +20984,7 @@ public struct ImportImageLicenseConfigurationResponse: Codable, Equatable {
 
 public struct ImportImageRequest: Codable, Equatable {
     public var architecture: String?
+    public var bootMode: BootModeValues?
     public var clientData: ClientData?
     public var clientToken: String?
     public var description: String?
@@ -21000,6 +21001,7 @@ public struct ImportImageRequest: Codable, Equatable {
     public var usageOperation: String?
 
     public init(architecture: String? = nil,
+                bootMode: BootModeValues? = nil,
                 clientData: ClientData? = nil,
                 clientToken: String? = nil,
                 description: String? = nil,
@@ -21015,6 +21017,7 @@ public struct ImportImageRequest: Codable, Equatable {
                 tagSpecifications: TagSpecificationList? = nil,
                 usageOperation: String? = nil) {
         self.architecture = architecture
+        self.bootMode = bootMode
         self.clientData = clientData
         self.clientToken = clientToken
         self.description = description
@@ -21033,6 +21036,7 @@ public struct ImportImageRequest: Codable, Equatable {
 
     enum CodingKeys: String, CodingKey {
         case architecture = "Architecture"
+        case bootMode = "BootMode"
         case clientData = "ClientData"
         case clientToken = "ClientToken"
         case description = "Description"
@@ -21131,6 +21135,7 @@ public struct ImportImageResult: Codable, Equatable {
 
 public struct ImportImageTask: Codable, Equatable {
     public var architecture: String?
+    public var bootMode: BootModeValues?
     public var description: String?
     public var encrypted: Boolean?
     public var hypervisor: String?
@@ -21148,6 +21153,7 @@ public struct ImportImageTask: Codable, Equatable {
     public var usageOperation: String?
 
     public init(architecture: String? = nil,
+                bootMode: BootModeValues? = nil,
                 description: String? = nil,
                 encrypted: Boolean? = nil,
                 hypervisor: String? = nil,
@@ -21164,6 +21170,7 @@ public struct ImportImageTask: Codable, Equatable {
                 tags: TagList? = nil,
                 usageOperation: String? = nil) {
         self.architecture = architecture
+        self.bootMode = bootMode
         self.description = description
         self.encrypted = encrypted
         self.hypervisor = hypervisor
@@ -21183,6 +21190,7 @@ public struct ImportImageTask: Codable, Equatable {
 
     enum CodingKeys: String, CodingKey {
         case architecture
+        case bootMode
         case description
         case encrypted
         case hypervisor
@@ -22394,19 +22402,23 @@ public struct InstanceMarketOptionsRequest: Codable, Equatable {
 
 public struct InstanceMetadataOptionsRequest: Codable, Equatable {
     public var httpEndpoint: InstanceMetadataEndpointState?
+    public var httpProtocolIpv6: InstanceMetadataProtocolState?
     public var httpPutResponseHopLimit: Integer?
     public var httpTokens: HttpTokensState?
 
     public init(httpEndpoint: InstanceMetadataEndpointState? = nil,
+                httpProtocolIpv6: InstanceMetadataProtocolState? = nil,
                 httpPutResponseHopLimit: Integer? = nil,
                 httpTokens: HttpTokensState? = nil) {
         self.httpEndpoint = httpEndpoint
+        self.httpProtocolIpv6 = httpProtocolIpv6
         self.httpPutResponseHopLimit = httpPutResponseHopLimit
         self.httpTokens = httpTokens
     }
 
     enum CodingKeys: String, CodingKey {
         case httpEndpoint = "HttpEndpoint"
+        case httpProtocolIpv6 = "HttpProtocolIpv6"
         case httpPutResponseHopLimit = "HttpPutResponseHopLimit"
         case httpTokens = "HttpTokens"
     }
@@ -22417,15 +22429,18 @@ public struct InstanceMetadataOptionsRequest: Codable, Equatable {
 
 public struct InstanceMetadataOptionsResponse: Codable, Equatable {
     public var httpEndpoint: InstanceMetadataEndpointState?
+    public var httpProtocolIpv6: InstanceMetadataProtocolState?
     public var httpPutResponseHopLimit: Integer?
     public var httpTokens: HttpTokensState?
     public var state: InstanceMetadataOptionsState?
 
     public init(httpEndpoint: InstanceMetadataEndpointState? = nil,
+                httpProtocolIpv6: InstanceMetadataProtocolState? = nil,
                 httpPutResponseHopLimit: Integer? = nil,
                 httpTokens: HttpTokensState? = nil,
                 state: InstanceMetadataOptionsState? = nil) {
         self.httpEndpoint = httpEndpoint
+        self.httpProtocolIpv6 = httpProtocolIpv6
         self.httpPutResponseHopLimit = httpPutResponseHopLimit
         self.httpTokens = httpTokens
         self.state = state
@@ -22433,6 +22448,7 @@ public struct InstanceMetadataOptionsResponse: Codable, Equatable {
 
     enum CodingKeys: String, CodingKey {
         case httpEndpoint
+        case httpProtocolIpv6
         case httpPutResponseHopLimit
         case httpTokens
         case state
@@ -25895,17 +25911,20 @@ public struct ModifyInstanceEventWindowResult: Codable, Equatable {
 public struct ModifyInstanceMetadataOptionsRequest: Codable, Equatable {
     public var dryRun: Boolean?
     public var httpEndpoint: InstanceMetadataEndpointState?
+    public var httpProtocolIpv6: InstanceMetadataProtocolState?
     public var httpPutResponseHopLimit: Integer?
     public var httpTokens: HttpTokensState?
     public var instanceId: InstanceId
 
     public init(dryRun: Boolean? = nil,
                 httpEndpoint: InstanceMetadataEndpointState? = nil,
+                httpProtocolIpv6: InstanceMetadataProtocolState? = nil,
                 httpPutResponseHopLimit: Integer? = nil,
                 httpTokens: HttpTokensState? = nil,
                 instanceId: InstanceId) {
         self.dryRun = dryRun
         self.httpEndpoint = httpEndpoint
+        self.httpProtocolIpv6 = httpProtocolIpv6
         self.httpPutResponseHopLimit = httpPutResponseHopLimit
         self.httpTokens = httpTokens
         self.instanceId = instanceId
@@ -25914,6 +25933,7 @@ public struct ModifyInstanceMetadataOptionsRequest: Codable, Equatable {
     enum CodingKeys: String, CodingKey {
         case dryRun = "DryRun"
         case httpEndpoint = "HttpEndpoint"
+        case httpProtocolIpv6 = "HttpProtocolIpv6"
         case httpPutResponseHopLimit = "HttpPutResponseHopLimit"
         case httpTokens = "HttpTokens"
         case instanceId = "InstanceId"
@@ -26049,6 +26069,7 @@ public struct ModifyManagedPrefixListRequest: Codable, Equatable {
     public var addEntries: AddPrefixListEntries?
     public var currentVersion: Long?
     public var dryRun: Boolean?
+    public var maxEntries: Integer?
     public var prefixListId: PrefixListResourceId
     public var prefixListName: String?
     public var removeEntries: RemovePrefixListEntries?
@@ -26056,12 +26077,14 @@ public struct ModifyManagedPrefixListRequest: Codable, Equatable {
     public init(addEntries: AddPrefixListEntries? = nil,
                 currentVersion: Long? = nil,
                 dryRun: Boolean? = nil,
+                maxEntries: Integer? = nil,
                 prefixListId: PrefixListResourceId,
                 prefixListName: String? = nil,
                 removeEntries: RemovePrefixListEntries? = nil) {
         self.addEntries = addEntries
         self.currentVersion = currentVersion
         self.dryRun = dryRun
+        self.maxEntries = maxEntries
         self.prefixListId = prefixListId
         self.prefixListName = prefixListName
         self.removeEntries = removeEntries
@@ -26071,6 +26094,7 @@ public struct ModifyManagedPrefixListRequest: Codable, Equatable {
         case addEntries = "AddEntry"
         case currentVersion = "CurrentVersion"
         case dryRun = "DryRun"
+        case maxEntries = "MaxEntries"
         case prefixListId = "PrefixListId"
         case prefixListName = "PrefixListName"
         case removeEntries = "RemoveEntry"
@@ -27728,6 +27752,7 @@ public struct NetworkInfo: Codable, Equatable {
     public var efaInfo: EfaInfo?
     public var efaSupported: EfaSupportedFlag?
     public var enaSupport: EnaSupport?
+    public var encryptionInTransitSupported: EncryptionInTransitSupported?
     public var ipv4AddressesPerInterface: MaxIpv4AddrPerInterface?
     public var ipv6AddressesPerInterface: MaxIpv6AddrPerInterface?
     public var ipv6Supported: Ipv6Flag?
@@ -27740,6 +27765,7 @@ public struct NetworkInfo: Codable, Equatable {
                 efaInfo: EfaInfo? = nil,
                 efaSupported: EfaSupportedFlag? = nil,
                 enaSupport: EnaSupport? = nil,
+                encryptionInTransitSupported: EncryptionInTransitSupported? = nil,
                 ipv4AddressesPerInterface: MaxIpv4AddrPerInterface? = nil,
                 ipv6AddressesPerInterface: MaxIpv6AddrPerInterface? = nil,
                 ipv6Supported: Ipv6Flag? = nil,
@@ -27751,6 +27777,7 @@ public struct NetworkInfo: Codable, Equatable {
         self.efaInfo = efaInfo
         self.efaSupported = efaSupported
         self.enaSupport = enaSupport
+        self.encryptionInTransitSupported = encryptionInTransitSupported
         self.ipv4AddressesPerInterface = ipv4AddressesPerInterface
         self.ipv6AddressesPerInterface = ipv6AddressesPerInterface
         self.ipv6Supported = ipv6Supported
@@ -27765,6 +27792,7 @@ public struct NetworkInfo: Codable, Equatable {
         case efaInfo
         case efaSupported
         case enaSupport
+        case encryptionInTransitSupported
         case ipv4AddressesPerInterface
         case ipv6AddressesPerInterface
         case ipv6Supported
diff --git a/Sources/ElasticComputeCloudModel/ElasticComputeCloudModelTypes.swift b/Sources/ElasticComputeCloudModel/ElasticComputeCloudModelTypes.swift
index fb0b2b45..0c11a7be 100644
--- a/Sources/ElasticComputeCloudModel/ElasticComputeCloudModelTypes.swift
+++ b/Sources/ElasticComputeCloudModel/ElasticComputeCloudModelTypes.swift
@@ -1849,6 +1849,11 @@ public typealias EnableFastSnapshotRestoreStateErrorSet = [EnableFastSnapshotRes
  */
 public typealias EnableFastSnapshotRestoreSuccessSet = [EnableFastSnapshotRestoreSuccessItem]
 
+/**
+ Type definition for the EncryptionInTransitSupported field.
+ */
+public typealias EncryptionInTransitSupported = Bool
+
 /**
  Enumeration restricting the values of the EndDateType field.
  */
@@ -2959,6 +2964,20 @@ public enum InstanceMetadataOptionsState: String, Codable, CustomStringConvertib
     public static let __default: InstanceMetadataOptionsState = .applied
 }
 
+/**
+ Enumeration restricting the values of the InstanceMetadataProtocolState field.
+ */
+public enum InstanceMetadataProtocolState: String, Codable, CustomStringConvertible {
+    case disabled
+    case enabled
+
+    public var description: String {
+        return rawValue
+    }
+    
+    public static let __default: InstanceMetadataProtocolState = .disabled
+}
+
 /**
  Type definition for the InstanceMonitoringList field.
  */
@@ -3278,6 +3297,15 @@ public enum InstanceType: String, Codable, CustomStringConvertible {
     case m6gdMedium = "m6gd.medium"
     case m6gdMetal = "m6gd.metal"
     case m6gdXlarge = "m6gd.xlarge"
+    case m6i12xlarge = "m6i.12xlarge"
+    case m6i16xlarge = "m6i.16xlarge"
+    case m6i24xlarge = "m6i.24xlarge"
+    case m6i2xlarge = "m6i.2xlarge"
+    case m6i32xlarge = "m6i.32xlarge"
+    case m6i4xlarge = "m6i.4xlarge"
+    case m6i8xlarge = "m6i.8xlarge"
+    case m6iLarge = "m6i.large"
+    case m6iXlarge = "m6i.xlarge"
     case mac1Metal = "mac1.metal"
     case p216xlarge = "p2.16xlarge"
     case p28xlarge = "p2.8xlarge"
diff --git a/Sources/SimpleQueueModel/SimpleQueueModelTypes.swift b/Sources/SimpleQueueModel/SimpleQueueModelTypes.swift
index f811933f..f9f10c5c 100644
--- a/Sources/SimpleQueueModel/SimpleQueueModelTypes.swift
+++ b/Sources/SimpleQueueModel/SimpleQueueModelTypes.swift
@@ -177,6 +177,7 @@ public enum QueueAttributeName: String, Codable, CustomStringConvertible {
     case policy = "Policy"
     case queuearn = "QueueArn"
     case receivemessagewaittimeseconds = "ReceiveMessageWaitTimeSeconds"
+    case redriveallowpolicy = "RedriveAllowPolicy"
     case redrivepolicy = "RedrivePolicy"
     case visibilitytimeout = "VisibilityTimeout"