diff --git a/common/control.h b/common/control.h
--- a/common/control.h
+++ b/common/control.h
@@ -22,6 +22,8 @@
 #include <QObject>
 #include <QVariantMap>
 
+class QFileSystemWatcher;
+
 class Control : public QObject
 {
     Q_OBJECT
@@ -39,6 +41,10 @@
     virtual ~Control() = default;
 
     virtual bool writeFile();
+    virtual void activateWatcher();
+
+Q_SIGNALS:
+    void changed();
 
 protected:
     virtual QString dirPath() const;
@@ -53,6 +59,7 @@
 private:
     static QString s_dirName;
     QVariantMap m_info;
+    QFileSystemWatcher *m_watcher = nullptr;
 };
 
 class ControlOutput;
@@ -77,6 +84,7 @@
     QString filePath() const override;
 
     bool writeFile() override;
+    void activateWatcher() override;
 
 private:
     QVariantList getOutputs() const;
diff --git a/common/control.cpp b/common/control.cpp
--- a/common/control.cpp
+++ b/common/control.cpp
@@ -18,6 +18,7 @@
 #include "globals.h"
 
 #include <QFile>
+#include <QFileSystemWatcher>
 #include <QJsonDocument>
 #include <QDir>
 
@@ -31,6 +32,18 @@
 {
 }
 
+void Control::activateWatcher()
+{
+    if (m_watcher) {
+        return;
+    }
+    m_watcher = new QFileSystemWatcher({filePath()}, this);
+    connect(m_watcher, &QFileSystemWatcher::fileChanged, this, [this]() {
+        readFile();
+        Q_EMIT changed();
+    });
+}
+
 bool Control::writeFile()
 {
     const QString path = filePath();
@@ -137,6 +150,14 @@
     //       in case of such a change while object exists?
 }
 
+void ControlConfig::activateWatcher()
+{
+    for (auto *output : m_outputsControls) {
+        output->activateWatcher();
+    }
+    Control::activateWatcher();
+}
+
 QString ControlConfig::dirPath() const
 {
     return Control::dirPath() % QStringLiteral("configs/");