diff --git a/src/gui/partresizerwidget.h b/src/gui/partresizerwidget.h
index 6e15d20..11b84a1 100644
--- a/src/gui/partresizerwidget.h
+++ b/src/gui/partresizerwidget.h
@@ -112,7 +112,7 @@ Q_SIGNALS:
     void firstSectorChanged(qint64);
     void lastSectorChanged(qint64);
 
-public Q_SLOTS:
+public:
     bool updateFirstSector(qint64 newFirstSector);
     bool updateLastSector(qint64 newLastSector);
     bool movePartition(qint64 newFirstSector);
diff --git a/src/ops/operation.cpp b/src/ops/operation.cpp
index 1e0d385..b2a0e75 100644
--- a/src/ops/operation.cpp
+++ b/src/ops/operation.cpp
@@ -117,9 +117,9 @@ void Operation::addJob(Job* job)
 {
     if (job) {
         jobs().append(job);
-        connect(job, SIGNAL(started()), SLOT(onJobStarted()));
-        connect(job, SIGNAL(progress(int)), SIGNAL(progress(int)));
-        connect(job, SIGNAL(finished()), SLOT(onJobFinished()));
+        connect(job, &Job::started, this, &Operation::onJobStarted);
+        connect(job, &Job::progress, this, &Operation::progress);
+        connect(job, &Job::finished, this, &Operation::onJobFinished);
     }
 }
 
diff --git a/src/ops/operation.h b/src/ops/operation.h
index 7750e3f..88d5868 100644
--- a/src/ops/operation.h
+++ b/src/ops/operation.h
@@ -120,11 +120,10 @@ public:
 
     LIBKPMCORE_EXPORT qint32 totalProgress() const;
 
-protected Q_SLOTS:
+protected:
     void onJobStarted();
     void onJobFinished();
 
-protected:
     void insertPreviewPartition(Device& targetDevice, Partition& newPartition);
     void removePreviewPartition(Device& device, Partition& p);
 
diff --git a/src/util/externalcommand.cpp b/src/util/externalcommand.cpp
index a9bb3a7..7f43b57 100644
--- a/src/util/externalcommand.cpp
+++ b/src/util/externalcommand.cpp
@@ -63,8 +63,8 @@ void ExternalCommand::setup()
     setEnvironment(QStringList() << QStringLiteral("LC_ALL=C") << QStringLiteral("PATH=") + QString::fromUtf8(getenv("PATH")));
     setProcessChannelMode(MergedChannels);
 
-    connect(this, SIGNAL(finished(int, QProcess::ExitStatus)), SLOT(onFinished(int)));
-    connect(this, SIGNAL(readyReadStandardOutput()), SLOT(onReadOutput()));
+    connect(this, static_cast<void(QProcess::*)(int, QProcess::ExitStatus)>(&QProcess::finished), this, &ExternalCommand::onFinished);
+    connect(this, &ExternalCommand::readyReadStandardOutput, this, &ExternalCommand::onReadOutput);
 }
 
 /** Starts the external command.
@@ -126,7 +126,8 @@ void ExternalCommand::onReadOutput()
         *report() << s;
 }
 
-void ExternalCommand::onFinished(int exitCode)
+void ExternalCommand::onFinished(int exitCode, QProcess::ExitStatus exitStatus)
 {
+    Q_UNUSED(exitStatus)
     setExitCode(exitCode);
 }
diff --git a/src/util/externalcommand.h b/src/util/externalcommand.h
index c9e4db1..bcca1a7 100644
--- a/src/util/externalcommand.h
+++ b/src/util/externalcommand.h
@@ -76,8 +76,7 @@ protected:
     }
     void setup();
 
-protected Q_SLOTS:
-    void onFinished(int exitCode);
+    void onFinished(int exitCode, QProcess::ExitStatus exitStatus);
     void onReadOutput();
 
 private: