diff --git a/index.d.ts b/index.d.ts
index c606d682..0b35579e 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -1,11 +1,17 @@
-// Type definitions for pino-pretty 4.7
+// Type definitions for pino-pretty 7.0
 // Project: https://github.com/pinojs/pino-pretty#readme
 // Definitions by: Adam Vigneaux <https://github.com/AdamVig>
+//                 tearwyx <https://github.com/tearwyx>
 // Minimum TypeScript Version: 3.0
 
+/// <reference types="node" />
+
+import { Transform } from 'stream';
+import { OnUnknown } from 'pino-abstract-transport';
+
 type LogDescriptor = Record<string, unknown>;
 
-declare function PinoPretty(options: PrettyOptions_): PinoPretty.Prettifier;
+declare function PinoPretty(options: PrettyOptions_): PinoPretty.PrettyStream;
 
 interface PrettyOptions_ {
   /**
@@ -121,8 +127,9 @@ interface PrettyOptions_ {
 declare namespace PinoPretty {
   type Prettifier = (inputData: string | object) => string;
   type MessageFormatFunc = (log: LogDescriptor, messageKey: string, levelLabel: string) => string;
-  type PrettyOptions = PrettyOptions_
+  type PrettyOptions = PrettyOptions_;
+  type PrettyStream = Transform & OnUnknown;
 }
 
 export default PinoPretty;
-export { PinoPretty, PrettyOptions_ as PrettyOptions }
+export { PinoPretty, PrettyOptions_ as PrettyOptions };
diff --git a/test/types/pino-pretty.test-d.ts b/test/types/pino-pretty.test-d.ts
index a4749f86..72bdd8c8 100644
--- a/test/types/pino-pretty.test-d.ts
+++ b/test/types/pino-pretty.test-d.ts
@@ -1,11 +1,11 @@
-import prettyFactory from "../../";
 import { expectType } from "tsd";
 
+import pretty from "../../";
 import PinoPretty, { PinoPretty as PinoPrettyNamed, PrettyOptions } from "../../";
 import PinoPrettyDefault from "../../";
 import * as PinoPrettyStar from "../../";
-import PinoPrettyCjsImport = require ("../../");
-import Prettifier = PinoPretty.Prettifier;
+import PinoPrettyCjsImport = require("../../");
+import PrettyStream = PinoPretty.PrettyStream;
 const PinoPrettyCjs = require("../../");
 
 const options: PinoPretty.PrettyOptions = {
@@ -52,16 +52,11 @@ const options2: PrettyOptions = {
   }
 };
 
-const pretty = prettyFactory(options);
-expectType<Prettifier>(pretty);
-
-expectType<Prettifier>(PinoPrettyNamed(options));
-expectType<Prettifier>(PinoPrettyDefault(options));
-expectType<Prettifier>(PinoPrettyStar.PinoPretty(options));
-expectType<Prettifier>(PinoPrettyStar.default(options));
-expectType<Prettifier>(PinoPrettyCjsImport.PinoPretty(options));
-expectType<Prettifier>(PinoPrettyCjsImport.default(options));
+expectType<PrettyStream>(pretty(options));
+expectType<PrettyStream>(PinoPrettyNamed(options));
+expectType<PrettyStream>(PinoPrettyDefault(options));
+expectType<PrettyStream>(PinoPrettyStar.PinoPretty(options));
+expectType<PrettyStream>(PinoPrettyStar.default(options));
+expectType<PrettyStream>(PinoPrettyCjsImport.PinoPretty(options));
+expectType<PrettyStream>(PinoPrettyCjsImport.default(options));
 expectType<any>(PinoPrettyCjs(options));
-
-expectType<string>(pretty({ foo: "bar" }));
-expectType<string>(pretty('dummy'));