diff --git a/src/hmac-based/hmac-based.ts b/src/hmac-based/hmac-based.ts
index 15e35fe..abefe6a 100644
--- a/src/hmac-based/hmac-based.ts
+++ b/src/hmac-based/hmac-based.ts
@@ -3,7 +3,7 @@ import {
   HotpValidateOptions,
   TotpConfig,
   ValidTotpConfig,
-} from "../interfaces/otp.interface";
+} from "../interfaces";
 import { generateConfig } from "../index";
 import { Decode32 } from "../utils/encode";
 import crypto from "crypto";
diff --git a/src/index.ts b/src/index.ts
index b561c7d..7d8ca9b 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -8,7 +8,7 @@ import {
     TotpConfig,
     UrlOptions,
     ValidTotpConfig,
-} from "./interfaces/otp.interface";
+} from "./interfaces";
 import { TimeBased } from "./time-based/time-based";
 import { Encode32 } from "./utils/encode";
 import crypto from "crypto";
@@ -79,3 +79,4 @@ export const generateUrl = (
 
 export const Totp = new TimeBased();
 export const Hotp = new HmacBased();
+export * from './interfaces';
\ No newline at end of file
diff --git a/src/interfaces/otp.interface.ts b/src/interfaces/index.ts
similarity index 100%
rename from src/interfaces/otp.interface.ts
rename to src/interfaces/index.ts
diff --git a/src/time-based/generate-key.ts b/src/time-based/generate-key.ts
index bdb1460..d0e6b2e 100644
--- a/src/time-based/generate-key.ts
+++ b/src/time-based/generate-key.ts
@@ -2,7 +2,7 @@ import {
   TotpConfig,
   TotpOptions,
   ValidTotpConfig,
-} from "../interfaces/otp.interface";
+} from "../interfaces";
 import { generateConfig, generateSecret, generateUrl } from "../index";
 
 // https://github.com/google/google-authenticator/wiki/Key-Uri-Format
diff --git a/src/time-based/time-based.ts b/src/time-based/time-based.ts
index c7b2ccf..72ab862 100644
--- a/src/time-based/time-based.ts
+++ b/src/time-based/time-based.ts
@@ -5,7 +5,7 @@ import {
   TotpOptions,
   ValidTotpConfig,
   TotpValidateOptions,
-} from "../interfaces/otp.interface";
+} from "../interfaces";
 import { generateConfig } from "../index";
 import { DEFAULT_TOTP_PERIOD } from "../utils/constants";
 import { ValidationError } from "../utils/validation-error";