diff --git a/src/updatechecker.h b/src/updatechecker.h
new file mode 100644
--- /dev/null
+++ b/src/updatechecker.h
@@ -0,0 +1,77 @@
+/*
+  Copyright © 2018 Hasan Yavuz Özderya
+
+  This file is part of serialplot.
+
+  serialplot is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  serialplot is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with serialplot.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef UPDATECHECKER_H
+#define UPDATECHECKER_H
+
+#include <QObject>
+#include <QNetworkAccessManager>
+#include <QNetworkReply>
+#include <QList>
+
+#include "versionnumber.h"
+
+class UpdateChecker : public QObject
+{
+    Q_OBJECT
+public:
+    explicit UpdateChecker(QObject *parent = 0);
+
+    bool isChecking() const;
+
+signals:
+    void checkFinished(bool found, QString newVersion, QString downloadUrl);
+    void checkFailed(QString errorMessage);
+
+public slots:
+    void checkUpdate();
+    void cancelCheck();
+
+private:
+    enum class FileArch
+    {
+        unknown,
+        _i386,
+        amd64,
+        arm
+    };
+
+    struct FileInfo
+    {
+        QString name;
+        QString link;
+        bool hasVersion;
+        VersionNumber version;
+        FileArch arch;
+    };
+
+    QNetworkAccessManager nam;
+    QNetworkReply* activeReply;
+
+    /// Parses json and creates a list of files
+    bool parseData(const QJsonDocument& data, QList<FileInfo>& files) const;
+    /// Finds the update file in the file list. Returns `-1` if no new version
+    /// is found.
+    bool findUpdate(const QList<FileInfo>& files, FileInfo& foundFile) const;
+
+private slots:
+    void onReqFinished(QNetworkReply* reply);
+};
+
+#endif // UPDATECHECKER_H