diff --git a/mupen64plus-gui/.github/workflows/build.yml b/mupen64plus-gui/.github/workflows/build.yml
index 698a983..d792658 100644
--- a/mupen64plus-gui/.github/workflows/build.yml
+++ b/mupen64plus-gui/.github/workflows/build.yml
@@ -4,7 +4,8 @@ on: [push, pull_request]
 
 jobs:
   build-linux:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
+    container: quay.io/centos/centos:stream8
     steps:
       - uses: actions/checkout@v2
       - name: Checkout core repo
@@ -14,14 +15,14 @@ jobs:
           path: mupen64plus-core
       - name: Update and install packages
         run: |
-          sudo apt-get -qq update
-          sudo apt-get -y install build-essential qt5-default libqt5websockets5-dev libsdl2-dev
+          dnf -y update
+          dnf -y install qt5-qtwebsockets-devel
       - name: Run build script
         run: |
           echo "#define GUI_VERSION \"a12345\"" > version.h
           mkdir build
           cd build
-          qmake ..
+          qmake-qt5 ..
           make
   build-windows:
     runs-on: windows-2022
diff --git a/mupen64plus-gui/interface/common.cpp b/mupen64plus-gui/interface/common.cpp
index 92e0ad1..90b5f83 100644
--- a/mupen64plus-gui/interface/common.cpp
+++ b/mupen64plus-gui/interface/common.cpp
@@ -168,10 +168,10 @@ m64p_error loadROM(QString filename)
     if (filename.endsWith(".7z") || filename.endsWith(".zip") || filename.endsWith(".ZIP"))
     {
         QProcess process;
-        QString command = "7za e -so \"";
-        command += filename;
-        command += "\" *64";
-        process.start(command);
+        process.setProgram("7za");
+        QStringList arguments = { "e", "-so", filename, "*64"  };
+        process.setArguments(arguments);
+        process.start();
         process.waitForFinished(-1);
         QByteArray data = process.readAllStandardOutput();
         romlength = data.size();
diff --git a/mupen64plus-gui/mainwindow.cpp b/mupen64plus-gui/mainwindow.cpp
index 00a0a48..6975382 100644
--- a/mupen64plus-gui/mainwindow.cpp
+++ b/mupen64plus-gui/mainwindow.cpp
@@ -499,10 +499,10 @@ void MainWindow::updateDownloadFinished(QNetworkReply *reply)
             file.setPermissions(QFileDevice::ReadOwner | QFileDevice::WriteOwner | QFileDevice::ExeOwner);
             file.close();
             QProcess process;
-            QString command = fullpath + " \"";
-            command += QCoreApplication::applicationDirPath();
-            command += "\"";
-            process.startDetached(command);
+            process.setProgram(fullpath);
+            QStringList arguments = { QCoreApplication::applicationDirPath() };
+            process.setArguments(arguments);
+            process.startDetached();
             reply->deleteLater();
             QCoreApplication::quit();
         }
@@ -533,7 +533,7 @@ void MainWindow::updateReplyFinished(QNetworkReply *reply)
                 req.setAttribute(QNetworkRequest::FollowRedirectsAttribute, true);
                 updateManager->get(req);
                 QMessageBox *message = new QMessageBox(this);
-                message->setStandardButtons(0);
+                message->setStandardButtons(QMessageBox::NoButton);
                 message->setText("Downloading updater");
                 message->show();
             }
diff --git a/mupen64plus-gui/mupen64plus-gui.pro b/mupen64plus-gui/mupen64plus-gui.pro
index 21e9060..a464a37 100644
--- a/mupen64plus-gui/mupen64plus-gui.pro
+++ b/mupen64plus-gui/mupen64plus-gui.pro
@@ -13,7 +13,7 @@ RC_ICONS = mupen64plus.ico
 ICON = mupen64plus.icns
 RESOURCES = mupen64plus-gui.qrc
 
-DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x050C00
+DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x050F00
 
 DEFINES += "NETPLAY_VER=8"
 
diff --git a/mupen64plus-gui/settingsdialog.cpp b/mupen64plus-gui/settingsdialog.cpp
index 9d12ae6..f906110 100644
--- a/mupen64plus-gui/settingsdialog.cpp
+++ b/mupen64plus-gui/settingsdialog.cpp
@@ -78,9 +78,9 @@ void SettingsDialog::initStuff()
         my_index = inputChoice->findText(qtInputPlugin);
     }
     inputChoice->setCurrentIndex(my_index);
-    connect(inputChoice, static_cast<void(QComboBox::*)(const QString &)>(&QComboBox::activated),
-        [=](const QString &text) {
-            w->getSettings()->setValue("inputPlugin", text);
+    connect(inputChoice, QOverload<int>::of(&QComboBox::activated),
+        [=](int index){
+            w->getSettings()->setValue("inputPlugin", inputChoice->itemText(index));
             w->updatePlugins();
     });
     layout->addWidget(inputChoice,5,1);