diff --git a/src/lib/mtproto/apiManager.ts b/src/lib/mtproto/apiManager.ts
index d69d9130..66fd949a 100644
--- a/src/lib/mtproto/apiManager.ts
+++ b/src/lib/mtproto/apiManager.ts
@@ -157,15 +157,15 @@ export class ApiManager {
   
   // mtpLogOut
   public async logOut() {
-    const storageKeys: Array<string> = [];
+    const storageKeys: Array<`dc${TrueDcId}_auth_key`> = [];
     
     const prefix = 'dc';
     for(let dcId = 1; dcId <= 5; dcId++) {
-      storageKeys.push(prefix + dcId + '_auth_key');
+      storageKeys.push(prefix + dcId + '_auth_key' as any);
     }
     
     // WebPushApiManager.forceUnsubscribe(); // WARNING // moved to worker's master
-    const storageResult = await Promise.all(storageKeys.map(key => sessionStorage.get(key as any)));
+    const storageResult = await Promise.all(storageKeys.map(key => sessionStorage.get(key)));
     
     const logoutPromises: Promise<any>[] = [];
     for(let i = 0; i < storageResult.length; i++) {
diff --git a/src/lib/mtproto/dcConfigurator.ts b/src/lib/mtproto/dcConfigurator.ts
index 5732e47e..c072e45f 100644
--- a/src/lib/mtproto/dcConfigurator.ts
+++ b/src/lib/mtproto/dcConfigurator.ts
@@ -22,6 +22,7 @@ import TcpObfuscated from './transports/tcpObfuscated';
 import { isSafari } from '../../helpers/userAgent';
 import { isWebWorker } from '../../helpers/context';
 import SocketProxied from './transports/socketProxied';
+import App from '../../config/app';
 /// #endif
 
 export type TransportType = 'websocket' | 'https' | 'http';
@@ -56,10 +57,9 @@ export class DcConfigurator {
   public chosenServers: Servers = {} as any;
 
   /// #if !MTPROTO_HTTP
-  private transportSocket = (dcId: number, connectionType: ConnectionType) => {
-    const subdomain = this.sslSubdomains[dcId - 1];
+  private transportSocket = (dcId: number, connectionType: ConnectionType, suffix: string) => {
     const path = 'apiws' + TEST_SUFFIX;
-    const chosenServer = 'wss://' + subdomain + '.web.telegram.org/' + path;
+    const chosenServer = `wss://${App.suffix.toLowerCase()}ws${dcId}${suffix}.web.telegram.org/${path}`;
     const logSuffix = connectionType === 'upload' ? '-U' : connectionType === 'download' ? '-D' : '';
 
     const retryTimeout = connectionType === 'client' ? 10000 : 10000;
@@ -71,7 +71,7 @@ export class DcConfigurator {
   /// #endif
 
   /// #if MTPROTO_HTTP_UPLOAD || MTPROTO_HTTP
-  private transportHTTP = (dcId: number, connectionType: ConnectionType) => {
+  private transportHTTP = (dcId: number, connectionType: ConnectionType, suffix: string) => {
     if(Modes.ssl || !Modes.http) {
       const subdomain = this.sslSubdomains[dcId - 1] + (connectionType !== 'client' ? '-1' : '');
       const path = Modes.test ? 'apiw_test1' : 'apiw1';
@@ -112,12 +112,14 @@ export class DcConfigurator {
     if(!transports.length || !reuse/*  || (upload && transports.length < 1) */) {
       let transport: MTTransport;
 
+      const suffix = connectionType === 'client' ? '' : '-1';
+
       /// #if MTPROTO_HTTP_UPLOAD
-      transport = (transportType === 'websocket' ? this.transportSocket : this.transportHTTP)(dcId, connectionType);
+      transport = (transportType === 'websocket' ? this.transportSocket : this.transportHTTP)(dcId, connectionType, suffix);
       /// #elif !MTPROTO_HTTP
-      transport = this.transportSocket(dcId, connectionType);
+      transport = this.transportSocket(dcId, connectionType, suffix);
       /// #else
-      transport = this.transportHTTP(dcId, connectionType);
+      transport = this.transportHTTP(dcId, connectionType, suffix);
       /// #endif
   
       if(!transport) {