diff --git a/QSimpleUpdater/src/dialogs/download_dialog.cpp b/QSimpleUpdater/src/dialogs/download_dialog.cpp
index 6a6e40b..2c11517 100644
--- a/QSimpleUpdater/src/dialogs/download_dialog.cpp
+++ b/QSimpleUpdater/src/dialogs/download_dialog.cpp
@@ -26,7 +26,7 @@ DownloadDialog::DownloadDialog (QWidget *parent)
              SLOT (ignoreSslErrors (QNetworkReply *, QList<QSslError>)));
 }
 
-DownloadDialog::~DownloadDialog() {
+DownloadDialog::~DownloadDialog(void) {
     delete ui;
 }
 
@@ -54,7 +54,7 @@ void DownloadDialog::beginDownload (const QUrl& url) {
     showNormal();
 }
 
-void DownloadDialog::openDownload() {
+void DownloadDialog::openDownload(void) {
     if (!m_path.isEmpty()) {
         QString url = m_path;
 
@@ -71,7 +71,7 @@ void DownloadDialog::openDownload() {
         qWarning() << "QSimpleUpdater: cannot open downloaded file!";
 }
 
-void DownloadDialog::cancelDownload() {
+void DownloadDialog::cancelDownload(void) {
     if (!m_reply->isFinished()) {
         QMessageBox _message;
         _message.setWindowTitle (tr ("Updater"));
@@ -89,7 +89,7 @@ void DownloadDialog::cancelDownload() {
         hide();
 }
 
-void DownloadDialog::downloadFinished() {
+void DownloadDialog::downloadFinished(void) {
     ui->stopButton->setText (tr ("Close"));
     ui->downloadLabel->setText (tr ("Download complete!"));
     ui->timeLabel->setText (tr ("The installer will open in a separate window..."));
diff --git a/QSimpleUpdater/src/dialogs/download_dialog.h b/QSimpleUpdater/src/dialogs/download_dialog.h
index f338bdd..52169d1 100644
--- a/QSimpleUpdater/src/dialogs/download_dialog.h
+++ b/QSimpleUpdater/src/dialogs/download_dialog.h
@@ -22,14 +22,14 @@ class DownloadDialog : public QWidget {
 
 public:
     explicit DownloadDialog (QWidget *parent = 0);
-    ~DownloadDialog();
+    ~DownloadDialog(void);
 
     void beginDownload (const QUrl& url);
 
 private slots:
-    void openDownload();
-    void cancelDownload();
-    void downloadFinished();
+    void openDownload(void);
+    void cancelDownload(void);
+    void downloadFinished(void);
     void updateProgress (qint64 received, qint64 total);
     void ignoreSslErrors (QNetworkReply *reply, const QList<QSslError>& error);
 
diff --git a/QSimpleUpdater/src/qsimpleupdater.cpp b/QSimpleUpdater/src/qsimpleupdater.cpp
index 84a135e..4418e07 100644
--- a/QSimpleUpdater/src/qsimpleupdater.cpp
+++ b/QSimpleUpdater/src/qsimpleupdater.cpp
@@ -16,7 +16,7 @@ QSimpleUpdater::QSimpleUpdater (QObject *parent)
     m_downloadDialog = new DownloadDialog();
 }
 
-QString QSimpleUpdater::changeLog() const {
+QString QSimpleUpdater::changeLog(void) const {
     if (m_changelog.isEmpty()) {
         qDebug() << "QSimpleUpdater: change log is empty,"
                  << "did you call setChangelogUrl() and checkForUpdates()?";
@@ -25,7 +25,7 @@ QString QSimpleUpdater::changeLog() const {
     return m_changelog;
 }
 
-void QSimpleUpdater::checkForUpdates() {
+void QSimpleUpdater::checkForUpdates(void) {
     if (!m_reference_url.isEmpty()) {
         QNetworkAccessManager *_manager = new QNetworkAccessManager (this);
 
@@ -42,7 +42,7 @@ void QSimpleUpdater::checkForUpdates() {
         qDebug() << "QSimpleUpdater: Invalid reference URL";
 }
 
-void QSimpleUpdater::openDownloadLink() {
+void QSimpleUpdater::openDownloadLink(void) {
     if (!m_download_url.isEmpty())
         QDesktopServices::openUrl (m_download_url);
 
@@ -52,7 +52,7 @@ void QSimpleUpdater::openDownloadLink() {
     }
 }
 
-QString QSimpleUpdater::latestVersion() const {
+QString QSimpleUpdater::latestVersion(void) const {
     if (m_latest_version.isEmpty()) {
         qDebug() << "QSimpleUpdater: latest version is empty,"
                  << "did you call checkForUpdates() and setReferenceUrl()?";
@@ -61,7 +61,7 @@ QString QSimpleUpdater::latestVersion() const {
     return m_latest_version;
 }
 
-QString QSimpleUpdater::installedVersion() const {
+QString QSimpleUpdater::installedVersion(void) const {
     if (m_installed_version.isEmpty()) {
         qDebug() << "QSimpleUpdater: installed version is empty,"
                  << "did you call setApplicationVersion()?";
@@ -70,7 +70,7 @@ QString QSimpleUpdater::installedVersion() const {
     return m_installed_version;
 }
 
-void QSimpleUpdater::downloadLatestVersion() {
+void QSimpleUpdater::downloadLatestVersion(void) {
     if (!m_download_url.isEmpty())
         m_downloadDialog->beginDownload (m_download_url);
 
@@ -80,7 +80,7 @@ void QSimpleUpdater::downloadLatestVersion() {
     }
 }
 
-bool QSimpleUpdater::newerVersionAvailable() const {
+bool QSimpleUpdater::newerVersionAvailable(void) const {
     return m_new_version_available;
 }
 
diff --git a/QSimpleUpdater/src/qsimpleupdater.h b/QSimpleUpdater/src/qsimpleupdater.h
index 9e46122..8b6ee57 100644
--- a/QSimpleUpdater/src/qsimpleupdater.h
+++ b/QSimpleUpdater/src/qsimpleupdater.h
@@ -23,29 +23,29 @@ public:
     QSimpleUpdater (QObject *parent = 0);
 
     /// Returns the downloaded change log
-    QString changeLog() const;
+    QString changeLog(void) const;
 
     /// Returns the downloaded version string
-    QString latestVersion() const;
+    QString latestVersion(void) const;
 
     /// Returns the local version, referenced by
     /// the setApplicationVersion() function
-    QString installedVersion() const;
+    QString installedVersion(void) const;
 
     /// Returns \c true if there's a newer version available
-    bool newerVersionAvailable() const;
+    bool newerVersionAvailable(void) const;
 
     /// Checks for updates and calls the appropriate
     /// signals when finished
-    void checkForUpdates();
+    void checkForUpdates(void);
 
     /// Opens the download URL in a a web browser.
     /// The URL is referenced by the \c setDownloadUrl() function
-    void openDownloadLink();
+    void openDownloadLink(void);
 
     /// Shows a dialog that downloads the file in the
     /// URL referenced by the \c setDownloadUrl() function
-    void downloadLatestVersion();
+    void downloadLatestVersion(void);
 
 public slots:
 
@@ -79,9 +79,9 @@ private slots:
     void ignoreSslErrors (QNetworkReply *reply, const QList<QSslError>& error);
 
 signals:
-    void checkingFinished();
-    void versionCheckFinished();
-    void changelogDownloadFinished();
+    void checkingFinished(void);
+    void versionCheckFinished(void);
+    void changelogDownloadFinished(void);
 
 private:
     QString m_changelog;