diff --git a/src/core/jsonutil.cpp b/src/core/jsonutil.cpp
index a41f69b..a71168b 100644
--- a/src/core/jsonutil.cpp
+++ b/src/core/jsonutil.cpp
@@ -29,7 +29,7 @@ void JsonUtil::exportSellers(const std::string& filename, Marketplace* market)
     writer->write(root, &file);
 }
 
-void JsonUtil::importSellers(const std::string& filename, Marketplace* market)
+void JsonUtil::importSellers(const std::filesystem::path& filePath, Marketplace* market)
 {
     for (auto& seller : market->getSellers()) {
         seller->setState(Seller::State::DELETE);
@@ -37,7 +37,7 @@ void JsonUtil::importSellers(const std::string& filename, Marketplace* market)
     market->storeToDb(true);
 
     Json::Value jsonValues;
-    std::ifstream file(filename);
+    std::ifstream file(filePath);
     file >> jsonValues;
 
     for (auto val : jsonValues["sellers"]) {
diff --git a/src/core/jsonutil.h b/src/core/jsonutil.h
index 1f0335d..50601bf 100644
--- a/src/core/jsonutil.h
+++ b/src/core/jsonutil.h
@@ -4,12 +4,13 @@
 #include "marketplace.h"
 
 #include <string>
+#include <filesystem>
 
 class JsonUtil
 {
   public:
     static void exportSellers(const std::string& filename, Marketplace* market);
-    static void importSellers(const std::string& filename, Marketplace* market);
+    static void importSellers(const std::filesystem::path& filePath, Marketplace* market);
     static void exportSales(const std::string& filename, Marketplace* market, int cashPointNo);
     static void importSales(const std::string& filename, Marketplace* market, int cashPointNo);
 };
diff --git a/src/gui/mainwindow.cpp b/src/gui/mainwindow.cpp
index abde041..4d4659f 100644
--- a/src/gui/mainwindow.cpp
+++ b/src/gui/mainwindow.cpp
@@ -15,8 +15,8 @@
 #include <posprinter.h>
 
 #include <exception>
-#include <regex>
 #include <filesystem>
+#include <regex>
 
 #include <QFileDialog>
 #include <QMessageBox>
@@ -377,9 +377,9 @@ void MainWindow::onImportSellerExcelActionTriggered()
 
     if (filename.isEmpty())
         return;
-    
+
     std::filesystem::path filePath(filename.toStdWString());
-    
+
     ExcelReader::readSellersFromFile(filePath, marketplace_.get());
 }
 
@@ -399,7 +399,9 @@ void MainWindow::onImportSellerJsonActionTriggered()
     if (filename.isEmpty())
         return;
 
-    JsonUtil::importSellers(filename.toStdString(), marketplace_.get());
+    std::filesystem::path filePath(filename.toStdWString());
+
+    JsonUtil::importSellers(filePath, marketplace_.get());
 }
 
 void MainWindow::onExportSellerJsonActionTriggered()