diff --git a/src/crypto-api.mjs b/src/crypto-api.mjs
index eed52c0..1213a0c 100644
--- a/src/crypto-api.mjs
+++ b/src/crypto-api.mjs
@@ -1,21 +1,21 @@
 'use strict';
 
-import Has160 from "./hasher/has160";
-import Md2 from "./hasher/md2";
-import Md4 from "./hasher/md4";
-import Md5 from "./hasher/md5";
-import Ripemd from "./hasher/ripemd";
-import Sha0 from "./hasher/sha0";
-import Sha1 from "./hasher/sha1";
-import Sha256 from "./hasher/sha256";
-import Sha512 from "./hasher/sha512";
-import Snefru from "./hasher/snefru";
-import Whirlpool from "./hasher/whirlpool";
-import {fromUtf} from "./encoder/utf";
-import {fromArrayBuffer} from "./encoder/array-buffer";
-import {toHex} from "./encoder/hex";
-import {toBase64} from "./encoder/base64";
-import Hmac from "./mac/hmac";
+import Has160 from "./hasher/has160.mjs";
+import Md2 from "./hasher/md2.mjs";
+import Md4 from "./hasher/md4.mjs";
+import Md5 from "./hasher/md5.mjs";
+import Ripemd from "./hasher/ripemd.mjs";
+import Sha0 from "./hasher/sha0.mjs";
+import Sha1 from "./hasher/sha1.mjs";
+import Sha256 from "./hasher/sha256.mjs";
+import Sha512 from "./hasher/sha512.mjs";
+import Snefru from "./hasher/snefru.mjs";
+import Whirlpool from "./hasher/whirlpool.mjs";
+import {fromUtf} from "./encoder/utf.mjs";
+import {fromArrayBuffer} from "./encoder/array-buffer.mjs";
+import {toHex} from "./encoder/hex.mjs";
+import {toBase64} from "./encoder/base64.mjs";
+import Hmac from "./mac/hmac.mjs";
 
 /**
  * Main class for ES5 compatibility.
@@ -159,4 +159,4 @@ class CryptoApi {
 }
 
 CryptoApi = new CryptoApi();
-export default CryptoApi;
\ No newline at end of file
+export default CryptoApi;
diff --git a/src/hasher/has160.mjs b/src/hasher/has160.mjs
index 883b8c4..ea8144d 100644
--- a/src/hasher/has160.mjs
+++ b/src/hasher/has160.mjs
@@ -1,7 +1,7 @@
 'use strict';
 
-import Hasher32le from "./hasher32le";
-import {rotateLeft} from "../tools/tools";
+import Hasher32le from "./hasher32le.mjs";
+import {rotateLeft} from "../tools/tools.mjs";
 
 // Transform constants
 /** @type {number[]} */
@@ -162,4 +162,4 @@ class Has160 extends Hasher32le {
   }
 }
 
-export default Has160;
\ No newline at end of file
+export default Has160;
diff --git a/src/hasher/hasher32be.mjs b/src/hasher/hasher32be.mjs
index f2add88..f13e289 100644
--- a/src/hasher/hasher32be.mjs
+++ b/src/hasher/hasher32be.mjs
@@ -1,6 +1,6 @@
 'use strict';
 
-import Hasher from "./hasher";
+import Hasher from "./hasher.mjs";
 
 /**
  * Hasher for 32 bit big endian blocks
diff --git a/src/hasher/hasher32le.mjs b/src/hasher/hasher32le.mjs
index 3208905..d166499 100644
--- a/src/hasher/hasher32le.mjs
+++ b/src/hasher/hasher32le.mjs
@@ -1,6 +1,6 @@
 'use strict';
 
-import Hasher from "./hasher";
+import Hasher from "./hasher.mjs";
 
 /**
  * Hasher for 32 bit little endian blocks
diff --git a/src/hasher/hasher8.mjs b/src/hasher/hasher8.mjs
index 9d2f71e..eaa237e 100644
--- a/src/hasher/hasher8.mjs
+++ b/src/hasher/hasher8.mjs
@@ -1,6 +1,6 @@
 'use strict';
 
-import Hasher from "./hasher";
+import Hasher from "./hasher.mjs";
 
 /**
  * Hasher for 8 bit blocks
diff --git a/src/hasher/md2.mjs b/src/hasher/md2.mjs
index 587ea78..fe1f6cc 100644
--- a/src/hasher/md2.mjs
+++ b/src/hasher/md2.mjs
@@ -1,6 +1,6 @@
 'use strict';
 
-import Hasher8 from "./hasher8";
+import Hasher8 from "./hasher8.mjs";
 
 /**
  * Constants from Pi
@@ -135,4 +135,4 @@ class Md2 extends Hasher8 {
   }
 }
 
-export default Md2;
\ No newline at end of file
+export default Md2;
diff --git a/src/hasher/md4.mjs b/src/hasher/md4.mjs
index e9af0b7..6f017fe 100644
--- a/src/hasher/md4.mjs
+++ b/src/hasher/md4.mjs
@@ -1,7 +1,7 @@
 'use strict';
 
-import Hasher32le from "./hasher32le";
-import {rotateLeft} from "../tools/tools";
+import Hasher32le from "./hasher32le.mjs";
+import {rotateLeft} from "../tools/tools.mjs";
 
 // Transform constants
 /** @type {number[]} */
diff --git a/src/hasher/md5.mjs b/src/hasher/md5.mjs
index 1efc041..e0e7e61 100644
--- a/src/hasher/md5.mjs
+++ b/src/hasher/md5.mjs
@@ -1,7 +1,7 @@
 'use strict';
 
-import Hasher32le from "./hasher32le";
-import {rotateLeft} from "../tools/tools";
+import Hasher32le from "./hasher32le.mjs";
+import {rotateLeft} from "../tools/tools.mjs";
 
 // Transform constants
 /** @type {number[]} */
diff --git a/src/hasher/ripemd.mjs b/src/hasher/ripemd.mjs
index e768282..6cd311d 100644
--- a/src/hasher/ripemd.mjs
+++ b/src/hasher/ripemd.mjs
@@ -1,7 +1,7 @@
 'use strict';
 
-import Hasher32le from "./hasher32le";
-import {rotateLeft} from "../tools/tools";
+import Hasher32le from "./hasher32le.mjs";
+import {rotateLeft} from "../tools/tools.mjs";
 
 /** @type {number[]} */
 const ZL = [
diff --git a/src/hasher/sha0.mjs b/src/hasher/sha0.mjs
index a1a97a9..28c8117 100644
--- a/src/hasher/sha0.mjs
+++ b/src/hasher/sha0.mjs
@@ -1,7 +1,7 @@
 'use strict';
 
-import Hasher32be from "./hasher32be";
-import {rotateLeft} from "../tools/tools";
+import Hasher32be from "./hasher32be.mjs";
+import {rotateLeft} from "../tools/tools.mjs";
 
 // Transform constants
 /** @type {number[]} */
diff --git a/src/hasher/sha1.mjs b/src/hasher/sha1.mjs
index f99b9d0..ff82c7e 100644
--- a/src/hasher/sha1.mjs
+++ b/src/hasher/sha1.mjs
@@ -1,7 +1,7 @@
 'use strict';
 
-import Hasher32be from "./hasher32be";
-import {rotateLeft} from "../tools/tools";
+import Hasher32be from "./hasher32be.mjs";
+import {rotateLeft} from "../tools/tools.mjs";
 
 // Transform constants
 /** @type {number[]} */
diff --git a/src/hasher/sha256.mjs b/src/hasher/sha256.mjs
index f07ec99..db6b34f 100644
--- a/src/hasher/sha256.mjs
+++ b/src/hasher/sha256.mjs
@@ -1,7 +1,7 @@
 'use strict';
 
-import Hasher32be from "./hasher32be";
-import {rotateRight} from "../tools/tools";
+import Hasher32be from "./hasher32be.mjs";
+import {rotateRight} from "../tools/tools.mjs";
 
 // Transform constants
 /** @type {number[]} */
diff --git a/src/hasher/sha512.mjs b/src/hasher/sha512.mjs
index d51985e..6327d35 100644
--- a/src/hasher/sha512.mjs
+++ b/src/hasher/sha512.mjs
@@ -1,7 +1,7 @@
 'use strict';
 
-import Hasher32be from "./hasher32be";
-import {rotateRight64hi, rotateRight64lo} from "../tools/tools";
+import Hasher32be from "./hasher32be.mjs";
+import {rotateRight64hi, rotateRight64lo} from "../tools/tools.mjs";
 
 // Transform constants
 /** @type {number[]} */
diff --git a/src/hasher/sm3.mjs b/src/hasher/sm3.mjs
index 4b0b2e1..76ef005 100644
--- a/src/hasher/sm3.mjs
+++ b/src/hasher/sm3.mjs
@@ -1,7 +1,7 @@
 'use strict';
 
-import Hasher32be from "./hasher32be";
-import {rotateLeft} from "../tools/tools";
+import Hasher32be from "./hasher32be.mjs";
+import {rotateLeft} from "../tools/tools.mjs";
 
 
 /**
diff --git a/src/hasher/snefru.mjs b/src/hasher/snefru.mjs
index 01f8681..1d584e9 100644
--- a/src/hasher/snefru.mjs
+++ b/src/hasher/snefru.mjs
@@ -1,7 +1,7 @@
 'use strict';
 
-import Hasher32be from "./hasher32be";
-import {rotateRight} from "../tools/tools";
+import Hasher32be from "./hasher32be.mjs";
+import {rotateRight} from "../tools/tools.mjs";
 
 /**
  * The random table is the first part of the random digits from the book:
diff --git a/src/hasher/whirlpool.mjs b/src/hasher/whirlpool.mjs
index 6e5d3ce..18f86b0 100644
--- a/src/hasher/whirlpool.mjs
+++ b/src/hasher/whirlpool.mjs
@@ -1,6 +1,6 @@
 'use strict';
-import {rotateRight64hi, rotateRight64lo} from "../tools/tools";
-import Hasher32be from "./hasher32be";
+import {rotateRight64hi, rotateRight64lo} from "../tools/tools.mjs";
+import Hasher32be from "./hasher32be.mjs";
 
 /** @type {number[]} */
 const SBOX = new Array(256);
diff --git a/src/index.mjs b/src/index.mjs
index 6f6b382..159a669 100644
--- a/src/index.mjs
+++ b/src/index.mjs
@@ -1,5 +1,5 @@
 'use strict';
 
-import CryptoApi from './crypto-api'
+import CryptoApi from './crypto-api.mjs'
 
-module.exports = CryptoApi
\ No newline at end of file
+module.exports = CryptoApi