diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,7 +1,7 @@
 project( rsibreak )
 
 cmake_minimum_required (VERSION 3.5.0 FATAL_ERROR)
-set (QT_MIN_VERSION "5.6.0")
+set (QT_MIN_VERSION "5.10.0")
 
 find_package(ECM 5.18.0 REQUIRED CONFIG)
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${ECM_MODULE_PATH} ${ECM_KDE_MODULE_DIR})
diff --git a/src/rsiwidget.cpp b/src/rsiwidget.cpp
--- a/src/rsiwidget.cpp
+++ b/src/rsiwidget.cpp
@@ -67,8 +67,6 @@
     connect(m_tray, &RSIDock::configChanged, m_relaxpopup, &RSIRelaxPopup::slotReadConfig);
     connect(m_tray, &RSIDock::suspend, m_relaxpopup, &RSIRelaxPopup::setSuspended);
 
-    qsrand( time( NULL ) );
-
     readConfig();
 
     setIcon( 0 );
diff --git a/src/slideshoweffect.cpp b/src/slideshoweffect.cpp
--- a/src/slideshoweffect.cpp
+++ b/src/slideshoweffect.cpp
@@ -27,6 +27,7 @@
 #include <QVBoxLayout>
 #include <QLabel>
 #include <QScreen>
+#include <QRandomGenerator>
 
 #include <KWindowSystem>
 
@@ -104,7 +105,7 @@
         int j;
         QString name;
         do {
-            j = ( int )( m_files.count() * ( qrand() / ( RAND_MAX + 1.0 ) ) );
+            j = QRandomGenerator::global()->bounded(m_files.count());
             name = m_files[ j ];
         } while ( m_files_done.indexOf( name ) != -1 );