diff --git a/src/client/app/common/scripts/get-md5.ts b/src/client/app/common/scripts/get-md5.ts
index b78a59811..b002d762b 100644
--- a/src/client/app/common/scripts/get-md5.ts
+++ b/src/client/app/common/scripts/get-md5.ts
@@ -1,5 +1,5 @@
 // スクリプトサイズがデカい
-//const crypto = require('crypto');
+//import * as crypto from 'crypto';
 
 export default (data: ArrayBuffer) => {
 	//const buf = new Buffer(data);
diff --git a/src/remote/activitypub/request.ts b/src/remote/activitypub/request.ts
index d98e36b3d..0ac64fc38 100644
--- a/src/remote/activitypub/request.ts
+++ b/src/remote/activitypub/request.ts
@@ -2,7 +2,7 @@ import { request } from 'https';
 const { sign } = require('http-signature');
 import { URL } from 'url';
 import * as debug from 'debug';
-const crypto = require('crypto');
+import * as crypto from 'crypto';
 const { lookup } = require('lookup-dns-cache');
 const promiseAny = require('promise-any');
 
diff --git a/src/server/api/endpoints/auth/accept.ts b/src/server/api/endpoints/auth/accept.ts
index b7e11bd46..3e45a2801 100644
--- a/src/server/api/endpoints/auth/accept.ts
+++ b/src/server/api/endpoints/auth/accept.ts
@@ -1,5 +1,5 @@
 import rndstr from 'rndstr';
-const crypto = require('crypto');
+import * as crypto from 'crypto';
 import $ from 'cafy';
 import App from '../../../../models/app';
 import AuthSess from '../../../../models/auth-session';