diff --git a/app/components/AppComponents.scala b/app/components/AppComponents.scala
index af0192c5..eca695a4 100644
--- a/app/components/AppComponents.scala
+++ b/app/components/AppComponents.scala
@@ -1,42 +1,40 @@
 package components
 
-import org.apache.pekko.actor.typed.ActorSystem
-import org.apache.pekko.actor.{ActorSystem => UntypedActorSystem}
-import com.amazonaws.{
-  AmazonClientException,
-  AmazonWebServiceRequest,
-  ClientConfiguration
-}
+import com.amazonaws.auth.profile.ProfileCredentialsProvider
 import com.amazonaws.auth.{
   AWSCredentialsProviderChain,
   InstanceProfileCredentialsProvider
 }
-import com.amazonaws.auth.profile.ProfileCredentialsProvider
 import com.amazonaws.regions.Regions
-import com.amazonaws.retry.{PredefinedRetryPolicies, RetryPolicy}
 import com.amazonaws.retry.PredefinedRetryPolicies.SDKDefaultRetryCondition
-import software.amazon.awssdk.services.dynamodb.DynamoDbClient
+import com.amazonaws.retry.{PredefinedRetryPolicies, RetryPolicy}
 import com.amazonaws.services.ec2.{AmazonEC2, AmazonEC2ClientBuilder}
 import com.amazonaws.services.s3.{AmazonS3, AmazonS3ClientBuilder}
+import com.amazonaws.services.securitytoken.model.GetCallerIdentityRequest
 import com.amazonaws.services.securitytoken.{
   AWSSecurityTokenService,
   AWSSecurityTokenServiceClientBuilder
 }
-import com.amazonaws.services.securitytoken.model.GetCallerIdentityRequest
-import com.amazonaws.services.sns.{
-  AmazonSNSAsync,
-  AmazonSNSAsyncClientBuilder,
-  AmazonSNSClientBuilder
+import com.amazonaws.services.sns.AmazonSNSClientBuilder
+import com.amazonaws.{
+  AmazonClientException,
+  AmazonWebServiceRequest,
+  ClientConfiguration
+}
+import com.google.auth.oauth2.ServiceAccountCredentials
+import com.gu.googleauth.{
+  AntiForgeryChecker,
+  AuthAction,
+  GoogleAuthConfig,
+  GoogleGroupChecker
 }
-import com.gu.{AppIdentity, AwsIdentity, DevIdentity}
-import com.gu.googleauth.{AntiForgeryChecker, AuthAction, GoogleAuthConfig}
 import com.gu.play.secretrotation.aws.parameterstore.{AwsSdkV2, SecretSupplier}
 import com.gu.play.secretrotation.{
   RotatingSecretComponents,
   SnapshotProvider,
   TransitionTiming
 }
-import java.time.Duration
+import com.gu.{AppIdentity, AwsIdentity, DevIdentity}
 import controllers._
 import data.{Dynamo, Recipes}
 import event.{ActorSystemWrapper, BakeEvent, Behaviours}
@@ -44,11 +42,13 @@ import housekeeping._
 import housekeeping.utils.{BakesRepo, PackerEC2Client}
 import models.NotificationConfig
 import notification.{LambdaDistributionBucket, NotificationSender, SNS}
+import org.apache.pekko.actor.typed.ActorSystem
+import org.apache.pekko.actor.{ActorSystem => UntypedActorSystem}
 import org.quartz.Scheduler
 import org.quartz.impl.StdSchedulerFactory
 import packer.{PackerConfig, PackerRunner}
-import play.api.BuiltInComponentsFromContext
 import play.api.ApplicationLoader.Context
+import play.api.BuiltInComponentsFromContext
 import play.api.i18n.I18nComponents
 import play.api.libs.ws.ahc.AhcWSComponents
 import play.api.mvc.{AnyContent, EssentialFilter}
@@ -59,26 +59,23 @@ import prism.Prism
 import router.Routes
 import schedule.{BakeScheduler, ScheduledBakeRunner}
 import services.{AmiMetadataLookup, Loggable, PrismData}
-import software.amazon.awssdk.services.ssm.SsmClient
 import software.amazon.awssdk.auth.credentials.{
-  StaticCredentialsProvider,
   AwsCredentialsProviderChain => AwsCredentialsProviderChainV2,
   InstanceProfileCredentialsProvider => InstanceProfileCredentialsProviderV2,
   ProfileCredentialsProvider => ProfileCredentialsProviderV2
 }
 import software.amazon.awssdk.regions.Region
+import software.amazon.awssdk.services.dynamodb.DynamoDbClient
+import software.amazon.awssdk.services.sns.SnsAsyncClient
+import software.amazon.awssdk.services.ssm.SsmClient
 
+import java.io.FileInputStream
+import java.time.Duration
 import java.time.Duration.{ofHours, ofMinutes}
 import scala.concurrent.Await
 import scala.concurrent.duration._
 import scala.language.postfixOps
-import java.io.FileInputStream
-import com.google.api.client.googleapis.auth.oauth2.GoogleCredential
 import scala.util.Try
-import com.gu.googleauth.GoogleGroupChecker
-import com.google.auth.oauth2.ServiceAccountCredentials
-import com.google.api.client
-import com.google.auth.oauth2.ServiceAccountCredentials
 
 class LoggingRetryCondition extends SDKDefaultRetryCondition with Loggable {
   private def exceptionInfo(e: Throwable): String = {
@@ -222,11 +219,11 @@ class AppComponents(context: Context, identity: AppIdentity)
     .withClientConfiguration(clientConfiguration)
     .build()
 
-  val anghammaradSNSClient: AmazonSNSAsync =
-    AmazonSNSAsyncClientBuilder.standard
-      .withRegion(region)
-      .withCredentials(awsCredsForV1)
-      .withClientConfiguration(clientConfiguration)
+  val anghammaradSNSClient: SnsAsyncClient =
+    SnsAsyncClient
+      .builder()
+      .region(Region.of(region.getName))
+      .credentialsProvider(awsCredsForV2)
       .build()
 
   val amigoUrl: String = configuration
diff --git a/app/models/NotificationConfig.scala b/app/models/NotificationConfig.scala
index c4cb7eea..0987a176 100644
--- a/app/models/NotificationConfig.scala
+++ b/app/models/NotificationConfig.scala
@@ -1,10 +1,10 @@
 package models
 
-import com.amazonaws.services.sns.AmazonSNSAsync
+import software.amazon.awssdk.services.sns.SnsAsyncClient
 
 case class NotificationConfig(
     baseUrl: String,
     snsTopicArn: String,
-    snsClient: AmazonSNSAsync,
+    snsClient: SnsAsyncClient,
     amigoStage: String
 )
diff --git a/build.sbt b/build.sbt
index de4524f6..038dc971 100644
--- a/build.sbt
+++ b/build.sbt
@@ -112,7 +112,7 @@ libraryDependencies ++= Seq(
   "org.scalatest" %% "scalatest-shouldmatchers" % "3.2.19" % Test,
   "org.scalatestplus" %% "mockito-3-4" % "3.2.10.0" % Test,
   "fun.mike" % "diff-match-patch" % "0.0.2",
-  "com.gu" %% "anghammarad-client" % "3.0.0"
+  "com.gu" %% "anghammarad-client" % "4.0.0"
 )
 routesGenerator := InjectedRoutesGenerator
 routesImport += "models._"