diff --git a/examples/echo/main.cpp b/examples/echo/main.cpp
index f95c03c..20daea5 100644
--- a/examples/echo/main.cpp
+++ b/examples/echo/main.cpp
@@ -11,7 +11,7 @@ void newMessage(Telegram::Message message)
     qDebug() << "new message:" << message;
 
     if (bot && message.type == Telegram::Message::TextType) {
-        bot->sendMessage((qint32)message.from.id, message.string);
+        bot->sendMessage(message.from.id, message.string);
     }
 }
 
diff --git a/types/chat.h b/types/chat.h
index eec2bfb..99a3fb3 100644
--- a/types/chat.h
+++ b/types/chat.h
@@ -17,7 +17,7 @@ public:
         Private, Group, Channel
     };
 
-    quint32 id;
+    qint32 id;
     ChatType type;
     QString title;
     QString username;
diff --git a/types/user.h b/types/user.h
index 1ab3682..f2af946 100644
--- a/types/user.h
+++ b/types/user.h
@@ -13,7 +13,7 @@ public:
     User() : id(0), firstname(QString()), lastname(QString()), username(QString()) {}
     User(QJsonObject user);
 
-    quint32 id;
+    qint32 id;
     QString firstname;
     QString lastname;
     QString username;