diff --git a/src/plugins/GreaseMonkey/gm_downloader.cpp b/src/plugins/GreaseMonkey/gm_downloader.cpp
index b202c8eaf..3bdbc7bfb 100644
--- a/src/plugins/GreaseMonkey/gm_downloader.cpp
+++ b/src/plugins/GreaseMonkey/gm_downloader.cpp
@@ -16,7 +16,6 @@
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 * ============================================================ */
 #include "gm_downloader.h"
-#include "gm_addscriptdialog.h"
 #include "gm_manager.h"
 #include "gm_script.h"
 
@@ -38,6 +37,11 @@ GM_Downloader::GM_Downloader(const QUrl &url, GM_Manager* manager)
     connect(m_reply, SIGNAL(finished()), this, SLOT(scriptDownloaded()));
 }
 
+void GM_Downloader::updateScript(const QString &fileName)
+{
+    m_fileName = fileName;
+}
+
 void GM_Downloader::scriptDownloaded()
 {
     if (m_reply != qobject_cast<FollowRedirectReply*>(sender())) {
@@ -52,13 +56,15 @@ void GM_Downloader::scriptDownloaded()
         const QByteArray response = QString::fromUtf8(m_reply->readAll()).toUtf8();
 
         if (response.contains(QByteArray("// ==UserScript=="))) {
-            const QString filePath = QString("%1/%2").arg(m_manager->scriptsDirectory(), QzTools::getFileNameFromUrl(m_reply->url()));
-            m_fileName = QzTools::ensureUniqueFilename(filePath);
-
+            if (m_fileName.isEmpty()) {
+                const QString filePath = QString("%1/%2").arg(m_manager->scriptsDirectory(), QzTools::getFileNameFromUrl(m_reply->url()));
+                m_fileName = QzTools::ensureUniqueFilename(filePath);
+            }
             QFile file(m_fileName);
 
             if (!file.open(QFile::WriteOnly)) {
                 qWarning() << "GreaseMonkey: Cannot open file for writing" << m_fileName;
+                emit error();
                 deleteLater();
                 return;
             }
@@ -91,6 +97,7 @@ void GM_Downloader::scriptDownloaded()
 void GM_Downloader::requireDownloaded()
 {
     if (m_reply != qobject_cast<FollowRedirectReply*>(sender())) {
+        emit error();
         deleteLater();
         return;
     }
@@ -109,6 +116,7 @@ void GM_Downloader::requireDownloaded()
 
             if (!file.open(QFile::WriteOnly)) {
                 qWarning() << "GreaseMonkey: Cannot open file for writing" << fileName;
+                emit error();
                 deleteLater();
                 return;
             }
@@ -135,24 +143,7 @@ void GM_Downloader::downloadRequires()
         connect(m_reply, SIGNAL(finished()), this, SLOT(requireDownloaded()));
     }
     else {
-        bool deleteScript = true;
-        GM_Script* script = new GM_Script(m_manager, m_fileName);
-
-        if (script->isValid()) {
-            if (!m_manager->containsScript(script->fullName())) {
-                GM_AddScriptDialog dialog(m_manager, script);
-                deleteScript = dialog.exec() != QDialog::Accepted;
-            }
-            else {
-                m_manager->showNotification(tr("'%1' is already installed").arg(script->name()));
-            }
-        }
-
-        if (deleteScript) {
-            delete script;
-            QFile(m_fileName).remove();
-        }
-
+        emit finished(m_fileName);
         deleteLater();
     }
 }
diff --git a/src/plugins/GreaseMonkey/gm_downloader.h b/src/plugins/GreaseMonkey/gm_downloader.h
index 31f79eed6..900f90072 100644
--- a/src/plugins/GreaseMonkey/gm_downloader.h
+++ b/src/plugins/GreaseMonkey/gm_downloader.h
@@ -32,6 +32,12 @@ class GM_Downloader : public QObject
 public:
     explicit GM_Downloader(const QUrl &url, GM_Manager* manager);
 
+    void updateScript(const QString& fileName);
+
+signals:
+    void finished(const QString& fileName);
+    void error();
+
 private slots:
     void scriptDownloaded();
     void requireDownloaded();
diff --git a/src/plugins/GreaseMonkey/gm_manager.cpp b/src/plugins/GreaseMonkey/gm_manager.cpp
index 1f0411b80..10117a861 100644
--- a/src/plugins/GreaseMonkey/gm_manager.cpp
+++ b/src/plugins/GreaseMonkey/gm_manager.cpp
@@ -20,6 +20,7 @@
 #include "gm_downloader.h"
 #include "gm_icon.h"
 #include "gm_urlinterceptor.h"
+#include "gm_addscriptdialog.h"
 #include "settings/gm_settings.h"
 
 #include "browserwindow.h"
@@ -256,7 +257,25 @@ void GM_Manager::scriptChanged()
 
 void GM_Manager::doDownloadScript(const QUrl &url)
 {
-    new GM_Downloader(url, this);
+    GM_Downloader *downloader = new GM_Downloader(url, this);
+    connect(downloader, &GM_Downloader::finished, this, [=](const QString &fileName) {
+        bool deleteScript = true;
+        GM_Script *script = new GM_Script(this, fileName);
+        if (script->isValid()) {
+            if (!containsScript(script->fullName())) {
+                GM_AddScriptDialog dialog(this, script);
+                deleteScript = dialog.exec() != QDialog::Accepted;
+            }
+            else {
+                showNotification(tr("'%1' is already installed").arg(script->name()));
+            }
+        }
+
+        if (deleteScript) {
+            delete script;
+            QFile(fileName).remove();
+        }
+    });
 }
 
 bool GM_Manager::canRunOnScheme(const QString &scheme)
diff --git a/src/plugins/GreaseMonkey/gm_script.cpp b/src/plugins/GreaseMonkey/gm_script.cpp
index d467babfc..1cd3b2bc3 100644
--- a/src/plugins/GreaseMonkey/gm_script.cpp
+++ b/src/plugins/GreaseMonkey/gm_script.cpp
@@ -17,9 +17,12 @@
 * ============================================================ */
 #include "gm_script.h"
 #include "gm_manager.h"
+#include "gm_downloader.h"
 
 #include "qzregexp.h"
 #include "delayedfilewatcher.h"
+#include "followredirectreply.h"
+#include "mainapplication.h"
 
 #include <QFile>
 #include <QStringList>
@@ -36,6 +39,7 @@ GM_Script::GM_Script(GM_Manager* manager, const QString &filePath)
     , m_fileName(filePath)
     , m_enabled(true)
     , m_valid(false)
+    , m_updating(false)
 {
     parseScript();
 
@@ -148,6 +152,31 @@ QWebEngineScript GM_Script::webScript() const
     return script;
 }
 
+bool GM_Script::isUpdating()
+{
+    return m_updating;
+}
+
+void GM_Script::updateScript()
+{
+    if (!m_downloadUrl.isValid() || m_updating)
+        return;
+
+    m_updating = true;
+    emit updatingChanged(m_updating);
+
+    GM_Downloader *downloader = new GM_Downloader(m_downloadUrl, m_manager);
+    downloader->updateScript(m_fileName);
+    connect(downloader, &GM_Downloader::finished, this, [this]() {
+        m_updating = false;
+        emit updatingChanged(m_updating);
+    });
+    connect(downloader, &GM_Downloader::error, this, [this]() {
+        m_updating = false;
+        emit updatingChanged(m_updating);
+    });
+}
+
 void GM_Script::watchedFileChanged(const QString &file)
 {
     if (m_fileName == file) {
@@ -254,6 +283,9 @@ void GM_Script::parseScript()
             m_version = value;
         }
         else if (key == QLatin1String("@updateURL")) {
+            m_updateUrl = QUrl(value);
+        }
+        else if (key == QLatin1String("@downloadURL")) {
             m_downloadUrl = QUrl(value);
         }
         else if (key == QLatin1String("@include") || key == QLatin1String("@match")) {
@@ -276,12 +308,6 @@ void GM_Script::parseScript()
                 m_startAt = DocumentIdle;
             }
         }
-        else if (key == QLatin1String("@downloadURL") && m_downloadUrl.isEmpty()) {
-            m_downloadUrl = QUrl(value);
-        }
-        else if (key == QLatin1String("@updateURL") && m_updateUrl.isEmpty()) {
-            m_updateUrl = QUrl(value);
-        }
     }
 
     if (m_include.isEmpty()) {
diff --git a/src/plugins/GreaseMonkey/gm_script.h b/src/plugins/GreaseMonkey/gm_script.h
index aa7ae2626..2075e1340 100644
--- a/src/plugins/GreaseMonkey/gm_script.h
+++ b/src/plugins/GreaseMonkey/gm_script.h
@@ -62,8 +62,12 @@ public:
 
     QWebEngineScript webScript() const;
 
+    bool isUpdating();
+    void updateScript();
+
 signals:
     void scriptChanged();
+    void updatingChanged(bool updating);
 
 private slots:
     void watchedFileChanged(const QString &file);
@@ -91,6 +95,7 @@ private:
     QString m_fileName;
     bool m_enabled;
     bool m_valid;
+    bool m_updating;
 };
 
 #endif // GM_SCRIPT_H
diff --git a/src/plugins/GreaseMonkey/settings/gm_settings.cpp b/src/plugins/GreaseMonkey/settings/gm_settings.cpp
index 09927eb32..63ac24bdd 100644
--- a/src/plugins/GreaseMonkey/settings/gm_settings.cpp
+++ b/src/plugins/GreaseMonkey/settings/gm_settings.cpp
@@ -38,6 +38,8 @@ GM_Settings::GM_Settings(GM_Manager* manager, QWidget* parent)
 
     connect(ui->listWidget, SIGNAL(itemDoubleClicked(QListWidgetItem*)),
             this, SLOT(showItemInfo(QListWidgetItem*)));
+    connect(ui->listWidget, SIGNAL(updateItemRequested(QListWidgetItem*)),
+            this, SLOT(updateItem(QListWidgetItem*)));
     connect(ui->listWidget, SIGNAL(removeItemRequested(QListWidgetItem*)),
             this, SLOT(removeItem(QListWidgetItem*)));
     connect(ui->openDirectory, SIGNAL(clicked()),
@@ -69,6 +71,15 @@ void GM_Settings::showItemInfo(QListWidgetItem* item)
     dialog->open();
 }
 
+void GM_Settings::updateItem(QListWidgetItem* item)
+{
+    GM_Script *script = getScript(item);
+    if (!script) {
+        return;
+    }
+    script->updateScript();
+}
+
 void GM_Settings::removeItem(QListWidgetItem* item)
 {
     GM_Script* script = getScript(item);
@@ -148,6 +159,8 @@ void GM_Settings::loadScripts()
         item->setText(script->name());
         item->setData(Qt::UserRole, script->version());
         item->setData(Qt::UserRole + 1, script->description());
+        item->setData(Qt::UserRole + 2, !script->downloadUrl().isEmpty());
+        item->setData(Qt::UserRole + 3, script->isUpdating());
 
         item->setFlags(item->flags() | Qt::ItemIsUserCheckable);
         item->setCheckState(script->isEnabled() ? Qt::Checked : Qt::Unchecked);
diff --git a/src/plugins/GreaseMonkey/settings/gm_settings.h b/src/plugins/GreaseMonkey/settings/gm_settings.h
index 519bc82b4..050ae5aab 100644
--- a/src/plugins/GreaseMonkey/settings/gm_settings.h
+++ b/src/plugins/GreaseMonkey/settings/gm_settings.h
@@ -40,6 +40,7 @@ public:
 
 private slots:
     void showItemInfo(QListWidgetItem* item);
+    void updateItem(QListWidgetItem* item);
     void removeItem(QListWidgetItem* item);
 
     void itemChanged(QListWidgetItem* item);
diff --git a/src/plugins/GreaseMonkey/settings/gm_settingslistdelegate.cpp b/src/plugins/GreaseMonkey/settings/gm_settingslistdelegate.cpp
index 5b1730f46..4d4f5fff2 100644
--- a/src/plugins/GreaseMonkey/settings/gm_settingslistdelegate.cpp
+++ b/src/plugins/GreaseMonkey/settings/gm_settingslistdelegate.cpp
@@ -29,6 +29,7 @@ GM_SettingsListDelegate::GM_SettingsListDelegate(QObject* parent)
     , m_padding(0)
 {
     m_removePixmap = IconProvider::standardIcon(QStyle::SP_DialogCloseButton).pixmap(16);
+    m_updateIcon = IconProvider::standardIcon(QStyle::SP_BrowserReload);
 }
 
 int GM_SettingsListDelegate::padding() const
@@ -63,6 +64,8 @@ void GM_SettingsListDelegate::paint(QPainter* painter, const QStyleOptionViewIte
 
     int leftPosition = m_padding;
     int rightPosition = opt.rect.right() - m_padding - 16; // 16 for remove button
+    if (index.data(Qt::UserRole + 2).toBool())
+        rightPosition -= m_padding + 16; // 16 for update button
 
     // Draw background
     style->drawPrimitive(QStyle::PE_PanelItemViewItem, &opt, painter, w);
@@ -109,6 +112,16 @@ void GM_SettingsListDelegate::paint(QPainter* painter, const QStyleOptionViewIte
     painter->setFont(opt.font);
     style->drawItemText(painter, infoRect, Qt::TextSingleLine | Qt::AlignLeft, opt.palette, true, info, colorRole);
 
+    // Draw update button
+    if (index.data(Qt::UserRole + 2).toBool()) {
+        const int updateIconSize = 16;
+        const int updateIconYPos = center - (updateIconSize / 2);
+        const QPixmap updatePixmap = m_updateIcon.pixmap(16, index.data(Qt::UserRole + 3).toBool() ? QIcon::Disabled : QIcon::Normal);
+        QRect updateIconRect(rightPosition, updateIconYPos, updateIconSize, updateIconSize);
+        painter->drawPixmap(updateIconRect, updatePixmap);
+        rightPosition += m_padding + 16;
+    }
+
     // Draw remove button
     const int removeIconSize = 16;
     const int removeIconYPos = center - (removeIconSize / 2);
diff --git a/src/plugins/GreaseMonkey/settings/gm_settingslistdelegate.h b/src/plugins/GreaseMonkey/settings/gm_settingslistdelegate.h
index 53f91be72..30668f408 100644
--- a/src/plugins/GreaseMonkey/settings/gm_settingslistdelegate.h
+++ b/src/plugins/GreaseMonkey/settings/gm_settingslistdelegate.h
@@ -32,6 +32,7 @@ public:
 
 private:
     QPixmap m_removePixmap;
+    QIcon m_updateIcon;
 
     mutable int m_rowHeight;
     mutable int m_padding;
diff --git a/src/plugins/GreaseMonkey/settings/gm_settingslistwidget.cpp b/src/plugins/GreaseMonkey/settings/gm_settingslistwidget.cpp
index 3baca0095..55a90ccaf 100644
--- a/src/plugins/GreaseMonkey/settings/gm_settingslistwidget.cpp
+++ b/src/plugins/GreaseMonkey/settings/gm_settingslistwidget.cpp
@@ -36,15 +36,18 @@ void GM_SettingsListWidget::mousePressEvent(QMouseEvent* event)
         return;
     }
 
+    if (containsUpdateIcon(event->pos())) {
+        emit updateItemRequested(itemAt(event->pos()));
+        return;
+    }
+
     QListWidget::mousePressEvent(event);
 }
 
 void GM_SettingsListWidget::mouseDoubleClickEvent(QMouseEvent* event)
 {
-    if (containsRemoveIcon(event->pos())) {
-        emit removeItemRequested(itemAt(event->pos()));
+    if (containsRemoveIcon(event->pos()) || containsUpdateIcon(event->pos()))
         return;
-    }
 
     QListWidget::mouseDoubleClickEvent(event);
 }
@@ -65,3 +68,19 @@ bool GM_SettingsListWidget::containsRemoveIcon(const QPoint &pos) const
 
     return removeIconRect.contains(pos);
 }
+
+bool GM_SettingsListWidget::containsUpdateIcon(const QPoint &pos) const
+{
+    QListWidgetItem *item = itemAt(pos);
+    if (!item || !item->data(Qt::UserRole + 2).toBool())
+        return false;
+
+    const QRect rect = visualItemRect(item);
+    const int updateIconPosition = rect.right() - m_delegate->padding() * 2 - 16 * 2;
+    const int center = rect.height() / 2 + rect.top();
+    const int updateIconYPos = center - (16 / 2);
+
+    QRect updateIconRect(updateIconPosition, updateIconYPos, 16, 16);
+
+    return updateIconRect.contains(pos);
+}
diff --git a/src/plugins/GreaseMonkey/settings/gm_settingslistwidget.h b/src/plugins/GreaseMonkey/settings/gm_settingslistwidget.h
index f70583408..d43598caa 100644
--- a/src/plugins/GreaseMonkey/settings/gm_settingslistwidget.h
+++ b/src/plugins/GreaseMonkey/settings/gm_settingslistwidget.h
@@ -30,11 +30,13 @@ public:
 
 signals:
     void removeItemRequested(QListWidgetItem* item);
+    void updateItemRequested(QListWidgetItem* item);
 
 public slots:
 
 private:
     bool containsRemoveIcon(const QPoint &pos) const;
+    bool containsUpdateIcon(const QPoint &pos) const;
 
     void mousePressEvent(QMouseEvent* event);
     void mouseDoubleClickEvent(QMouseEvent* event);