diff --git a/src/core/jsonutil.cpp b/src/core/jsonutil.cpp
index b4d9dc3..cb6de76 100644
--- a/src/core/jsonutil.cpp
+++ b/src/core/jsonutil.cpp
@@ -5,10 +5,10 @@
 
 #include <fstream>
 
-void JsonUtil::exportSellers(const std::string& filename, Marketplace* market)
+void JsonUtil::exportSellers(const std::filesystem::path& filePath, Marketplace* market)
 {
     Json::Value root;
-    std::ofstream file(filename);
+    std::ofstream file(filePath);
 
     Json::StreamWriterBuilder builder;
     builder["commentStyle"] = "None";
diff --git a/src/core/jsonutil.h b/src/core/jsonutil.h
index d85d79f..3663dcc 100644
--- a/src/core/jsonutil.h
+++ b/src/core/jsonutil.h
@@ -9,7 +9,7 @@
 class JsonUtil
 {
   public:
-    static void exportSellers(const std::string& filename, Marketplace* market);
+    static void exportSellers(const std::filesystem::path& filePath, Marketplace* market);
     static void importSellers(const std::filesystem::path& filePath, Marketplace* market);
     static void exportSales(const std::filesystem::path& filePath, Marketplace* market, int cashPointNo);
     static void importSales(const std::filesystem::path& filePath, Marketplace* market, int cashPointNo);
diff --git a/src/gui/mainwindow.cpp b/src/gui/mainwindow.cpp
index d9a1da5..b643204 100644
--- a/src/gui/mainwindow.cpp
+++ b/src/gui/mainwindow.cpp
@@ -412,7 +412,9 @@ void MainWindow::onExportSellerJsonActionTriggered()
     if (filename.isEmpty())
         return;
 
-    JsonUtil::exportSellers(filename.toStdString(), marketplace_.get());
+    std::filesystem::path filePath(filename.toStdWString());
+
+    JsonUtil::exportSellers(filePath, marketplace_.get());
 }
 
 void MainWindow::onExportSalesJsonActionTriggered()