diff --git a/src/main/java/quant/rich/emoney/client/OkHttpClientProvider.java b/src/main/java/quant/rich/emoney/client/OkHttpClientProvider.java
index 3e4757f..739d248 100644
--- a/src/main/java/quant/rich/emoney/client/OkHttpClientProvider.java
+++ b/src/main/java/quant/rich/emoney/client/OkHttpClientProvider.java
@@ -1,18 +1,12 @@
 package quant.rich.emoney.client;
 
 import java.io.IOException;
-import java.net.Inet4Address;
-import java.net.InetAddress;
 import java.net.Proxy;
-import java.net.UnknownHostException;
 import java.security.KeyStore;
 import java.security.SecureRandom;
 import java.security.cert.X509Certificate;
 import java.util.Arrays;
-import java.util.List;
 import java.util.function.Consumer;
-import java.util.stream.Collectors;
-
 import javax.net.ssl.HostnameVerifier;
 import javax.net.ssl.SSLContext;
 import javax.net.ssl.SSLSession;
@@ -21,7 +15,6 @@ import javax.net.ssl.TrustManager;
 import javax.net.ssl.TrustManagerFactory;
 import javax.net.ssl.X509TrustManager;
 
-import okhttp3.Dns;
 import okhttp3.Interceptor;
 import okhttp3.OkHttpClient;
 import okhttp3.Request;
@@ -44,7 +37,7 @@ public class OkHttpClientProvider {
 
     private static ProxyConfig getProxyConfig() {
         if (proxyConfig == null) {
-            synchronized (EmoneyClient.class) {
+            synchronized (OkHttpClientProvider.class) {
                 if (proxyConfig == null) {
                     proxyConfig = SpringContextHolder.getBean(ProxyConfig.class);
                 }