diff --git a/client/protocols/shadowsocksvpnprotocol.cpp b/client/protocols/shadowsocksvpnprotocol.cpp
index dafb7fa2..82ae08b8 100644
--- a/client/protocols/shadowsocksvpnprotocol.cpp
+++ b/client/protocols/shadowsocksvpnprotocol.cpp
@@ -116,5 +116,17 @@ QString ShadowSocksVpnProtocol::shadowSocksExecPath()
 
 void ShadowSocksVpnProtocol::readShadowSocksConfiguration(const QJsonObject &configuration)
 {
-    m_shadowSocksConfig = configuration.value(ProtocolProps::key_proto_config_data(Proto::ShadowSocks)).toObject();
+    QJsonObject shadowSocksConfig = configuration.value(ProtocolProps::key_proto_config_data(Proto::ShadowSocks)).toObject();
+    bool isLocalPortConvertOk = false;
+    bool isServerPortConvertOk = false;
+    int localPort = shadowSocksConfig.value("local_port").toString().toInt(&isLocalPortConvertOk);
+    int serverPort = shadowSocksConfig.value("server_port").toString().toInt(&isServerPortConvertOk);
+    if (!isLocalPortConvertOk) {
+        qDebug() << "Error when converting local_port field in ShadowSocks config";
+    } else if (!isServerPortConvertOk) {
+        qDebug() << "Error when converting server_port field in ShadowSocks config";
+    }
+    shadowSocksConfig["local_port"] = localPort;
+    shadowSocksConfig["server_port"] = serverPort;
+    m_shadowSocksConfig = shadowSocksConfig;
 }