diff --git a/package.json b/package.json
index b4611ea..7f8a20f 100755
--- a/package.json
+++ b/package.json
@@ -183,7 +183,8 @@
     },
     "./extensions": {
       "require": "./src/extensions/ua-parser-extensions.js",
-      "import": "./src/extensions/ua-parser-extensions.mjs"
+      "import": "./src/extensions/ua-parser-extensions.mjs",
+      "types": "./src/extensions/ua-parser-extensions.d.ts"
     },
     "./helpers": {
       "require": "./src/helpers/ua-parser-helpers.js",
diff --git a/src/extensions/ua-parser-extensions.d.ts b/src/extensions/ua-parser-extensions.d.ts
new file mode 100644
index 0000000..12750c8
--- /dev/null
+++ b/src/extensions/ua-parser-extensions.d.ts
@@ -0,0 +1,13 @@
+// Type definitions for Helpers submodule of UAParser.js v2.0.0-beta.1
+// Project: https://github.com/faisalman/ua-parser-js
+// Definitions by: Faisal Salman <https://github.com/faisalman>
+
+import type { UAParserExt } from "../main/ua-parser";
+
+export const Apps: UAParserExt;
+export const Bots: UAParserExt;
+export const CLIs: UAParserExt;
+export const ExtraDevices: UAParserExt;
+export const Emails: UAParserExt;
+export const MediaPlayers: UAParserExt;
+export const Modules: UAParserExt;
\ No newline at end of file
diff --git a/src/main/ua-parser.d.ts b/src/main/ua-parser.d.ts
index c46b80c..2d6f9b6 100644
--- a/src/main/ua-parser.d.ts
+++ b/src/main/ua-parser.d.ts
@@ -47,10 +47,12 @@ declare namespace UAParser {
     }
 
     type RegexMap = ((RegExp | string | (string | RegExp | Function)[])[])[];
+    type UAParserProps = 'browser' | 'cpu' | 'device' | 'engine' | 'os';
+    type UAParserExt = Record<UAParserProps, RegexMap>;
 
-    export function UAParser(uastring?: string, extensions?: Record<string, RegexMap>, headers?: Record<string, string>): IResult;
+    export function UAParser(uastring?: string, extensions?: UAParserExt, headers?: Record<string, string>): IResult;
     export function UAParser(uastring?: string, headers?: Record<string, string>): IResult;
-    export function UAParser(extensions?: Record<string, RegexMap>, headers?: Record<string, string>): IResult;
+    export function UAParser(extensions?: UAParserExt, headers?: Record<string, string>): IResult;
     export function UAParser(headers?: Record<string, string>): IResult;
 
     export class UAParser {
@@ -84,9 +86,9 @@ declare namespace UAParser {
         };
         static readonly VERSION: string;
 
-        constructor(uastring?: string, extensions?: Record<string, RegexMap>, headers?: Record<string, string>);
+        constructor(uastring?: string, extensions?: UAParserExt, headers?: Record<string, string>);
         constructor(uastring?: string, headers?: Record<string, string>);
-        constructor(extensions?: Record<string, RegexMap>, headers?: Record<string, string>);
+        constructor(extensions?: UAParserExt, headers?: Record<string, string>);
         constructor(headers?: Record<string, string>);
     
         getUA(): string;