diff --git a/src/i2pd b/src/i2pd
index 905c6de..d241e5d 160000
--- a/src/i2pd
+++ b/src/i2pd
@@ -1 +1 @@
-Subproject commit 905c6debf2a7f7e651a7916e646a2aee25ba57c7
+Subproject commit d241e5d5cbf7c78de7badf19608a164d355dbf54
diff --git a/src/mainwindow.cpp b/src/mainwindow.cpp
index 433630a..f88bf0c 100644
--- a/src/mainwindow.cpp
+++ b/src/mainwindow.cpp
@@ -306,7 +306,7 @@ MainWindow::MainWindow(std::shared_ptr<std::iostream> logStream_, QWidget *paren
     initStringBox(      OPTION("addressbook","defaulturl",[]{return "";}), uiSettings->addressbookDefaultURLLineEdit);
     initStringBox(      OPTION("addressbook","subscriptions",[]{return "";}), uiSettings->addressbookSubscriptionsURLslineEdit);
 
-    initUInt16Box(     OPTION("limits","transittunnels",[]{return "2500";}), uiSettings->maxNumOfTransitTunnelsLineEdit, tr("maxNumberOfTransitTunnels"));
+    initUIntBox(     OPTION("limits","transittunnels",[]{return "2500";}), uiSettings->maxNumOfTransitTunnelsLineEdit, tr("maxNumberOfTransitTunnels"));
     initUInt16Box(     OPTION("limits","openfiles",[]{return "0";}), uiSettings->maxNumOfOpenFilesLineEdit, tr("maxNumberOfOpenFiles"));
     initUInt32Box(     OPTION("limits","coresize",[]{return "0";}), uiSettings->coreFileMaxSizeNumberLineEdit, tr("coreFileMaxSize"));
 
@@ -709,6 +709,9 @@ void MainWindow::initCheckBox(ConfigOption option, QCheckBox* checkBox) {
 void MainWindow::initIntegerBox(ConfigOption option, QLineEdit* numberLineEdit, QString fieldNameTranslated){
     configItems.append(new IntegerStringItem(option, numberLineEdit, fieldNameTranslated, this));
 }
+void MainWindow::initUIntBox(ConfigOption option, QLineEdit* numberLineEdit, QString fieldNameTranslated){
+    configItems.append(new UIntStringItem(option, numberLineEdit, fieldNameTranslated, this));
+}
 void MainWindow::initUInt32Box(ConfigOption option, QLineEdit* numberLineEdit, QString fieldNameTranslated){
     configItems.append(new UInt32StringItem(option, numberLineEdit, fieldNameTranslated, this));
 }
diff --git a/src/mainwindow.h b/src/mainwindow.h
index 1522e4c..2f7b2c2 100644
--- a/src/mainwindow.h
+++ b/src/mainwindow.h
@@ -158,6 +158,8 @@ public:
             out << boost::any_cast<uint32_t>(optionValue);
         }else if(isType<int>(optionValue)) {
             out << boost::any_cast<int>(optionValue);
+        }else if(isType<unsigned long>(optionValue)) {
+            out << boost::any_cast<unsigned long>(optionValue);
         }else if(isType<unsigned short>(optionValue)) {
             out << boost::any_cast<unsigned short>(optionValue);
         }else out << boost::any_cast<std::string>(optionValue); //let it throw
@@ -330,6 +332,24 @@ public:
     virtual QString toString(){return QString::number(boost::any_cast<int>(optionValue));}
     virtual boost::any fromString(QString s){return boost::any(std::stoi(s.toStdString()));}
 };
+class UIntStringItem : public BaseFormattedStringItem {
+public:
+    UIntStringItem(ConfigOption option_, QLineEdit* lineEdit_, QString fieldNameTranslated_, MainWindow* mw) :
+        BaseFormattedStringItem(option_, lineEdit_, fieldNameTranslated_,
+                                QApplication::tr("Must be a valid integer."), mw) {}
+    virtual ~UIntStringItem(){}
+    virtual bool isValid(bool & alreadyDisplayedIfWrong){
+        bool correct = BaseFormattedStringItem::isValid(alreadyDisplayedIfWrong);
+        if(!correct)return false;
+        alreadyDisplayedIfWrong = false;
+        auto str=lineEdit->text();
+        bool ok;
+        str.toUInt(&ok);
+        return ok;
+    }
+    virtual QString toString(){return QString::number(boost::any_cast<unsigned int>(optionValue));}
+    virtual boost::any fromString(QString s){return boost::any(std::stoul(s.toStdString()));}
+};
 class UShortStringItem : public BaseFormattedStringItem {
 public:
     UShortStringItem(ConfigOption option_, QLineEdit* lineEdit_, QString fieldNameTranslated_, MainWindow* mw) :
@@ -543,6 +563,7 @@ protected:
     void initTCPPortBox(ConfigOption option, QLineEdit* portLineEdit, QString fieldNameTranslated);
     void initCheckBox(ConfigOption option, QCheckBox* checkBox);
     void initIntegerBox(ConfigOption option, QLineEdit* numberLineEdit, QString fieldNameTranslated);
+    void initUIntBox(ConfigOption option, QLineEdit* numberLineEdit, QString fieldNameTranslated);
     void initUInt32Box(ConfigOption option, QLineEdit* numberLineEdit, QString fieldNameTranslated);
     void initUInt16Box(ConfigOption option, QLineEdit* numberLineEdit, QString fieldNameTranslated);
     void initStringBox(ConfigOption option, QLineEdit* lineEdit);