diff --git a/src/utils/index.ts b/src/utils/index.ts
index a46e61c..e882e21 100644
--- a/src/utils/index.ts
+++ b/src/utils/index.ts
@@ -13,6 +13,7 @@ export {
   LambdaMiddyfyOptions,
   ScheduledHandlerFn,
   ScheduledMiddyfyOptions,
+  SNSHandlerFn,
   SNSMiddyfyOptions,
   SQSMiddyfyOptions,
 } from './middyfy';
diff --git a/src/utils/middyfy.ts b/src/utils/middyfy.ts
index 2fb8820..84b3f86 100644
--- a/src/utils/middyfy.ts
+++ b/src/utils/middyfy.ts
@@ -8,7 +8,7 @@ import {
   Context,
   ScheduledEvent,
   SQSHandler,
-  SNSHandler,
+  SNSEvent,
 } from 'aws-lambda';
 import { ObjectSchema } from 'joi';
 
@@ -30,6 +30,11 @@ export type APIGatewayHandlerFn = (
  */
 export type ScheduledHandlerFn = (event: ScheduledEvent, context: Context) => Promise<void>;
 
+/**
+ * The AWS Lambda handler function signature for SNS events.
+ */
+export type SNSHandlerFn = (event: SNSEvent, context: Context) => Promise<void>;
+
 /**
  * A Lambda function for invocation by another Lambda function.
  */
@@ -81,7 +86,7 @@ export type ScheduledMiddyfyOptions = MiddyfyOptions<ScheduledHandlerFn> & {
 /**
  * Options for middyfied SNS event handler functions.
  */
-export type SNSMiddyfyOptions = MiddyfyOptions<SNSHandler> & {
+export type SNSMiddyfyOptions = MiddyfyOptions<SNSHandlerFn> & {
   eventSchema?: ObjectSchema;
 };