diff --git a/src/qt/qt_mainwindow.ui b/src/qt/qt_mainwindow.ui
index 69197d015..60b77d290 100644
--- a/src/qt/qt_mainwindow.ui
+++ b/src/qt/qt_mainwindow.ui
@@ -15,7 +15,7 @@
   </property>
   <widget class="QWidget" name="centralwidget">
    <property name="sizePolicy">
-    <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
+    <sizepolicy hsizetype="Expanding" vsizetype="Expanding">
      <horstretch>0</horstretch>
      <verstretch>0</verstretch>
     </sizepolicy>
@@ -37,7 +37,14 @@
      <number>0</number>
     </property>
     <item>
-     <widget class="RendererStack" name="stackedWidget"/>
+     <widget class="RendererStack" name="stackedWidget">
+      <property name="sizePolicy">
+       <sizepolicy hsizetype="Expanding" vsizetype="Expanding">
+        <horstretch>0</horstretch>
+        <verstretch>0</verstretch>
+       </sizepolicy>
+      </property>
+     </widget>
     </item>
    </layout>
   </widget>
diff --git a/src/qt/qt_opengloptions.cpp b/src/qt/qt_opengloptions.cpp
index 26b8f05fe..95f13f2df 100644
--- a/src/qt/qt_opengloptions.cpp
+++ b/src/qt/qt_opengloptions.cpp
@@ -183,10 +183,10 @@ OpenGLOptions::addShader(const QString &path)
                 .toStdString());
     };
 
-    if (!shader->addShaderFromSourceCode(QOpenGLShader::Vertex, version_line % "\n#define VERTEX\n" % shader_text))
+    if (!shader->addShaderFromSourceCode(QOpenGLShader::Vertex, version_line % "\n#extension GL_ARB_shading_language_420pack : enable\n" % "\n#define VERTEX\n" % shader_text))
         throw_shader_error(tr("Error compiling vertex shader in file \"%1\""));
 
-    if (!shader->addShaderFromSourceCode(QOpenGLShader::Fragment, version_line % "\n#define FRAGMENT\n" % shader_text))
+    if (!shader->addShaderFromSourceCode(QOpenGLShader::Fragment, version_line % "\n#extension GL_ARB_shading_language_420pack : enable\n"  "\n#define FRAGMENT\n" % shader_text))
         throw_shader_error(tr("Error compiling fragment shader in file \"%1\""));
 
     if (!shader->link())
diff --git a/src/qt/qt_openglrenderer.cpp b/src/qt/qt_openglrenderer.cpp
index 173e82448..eb5656d3b 100644
--- a/src/qt/qt_openglrenderer.cpp
+++ b/src/qt/qt_openglrenderer.cpp
@@ -18,6 +18,7 @@
 #include <QMessageBox>
 #include <QOpenGLShaderProgram>
 #include <QSurfaceFormat>
+#include <QOpenGLTexture>
 
 #include <cmath>
 
@@ -87,8 +88,8 @@ OpenGLRenderer::resizeEvent(QResizeEvent *event)
     glViewport(
         destination.x(),
         destination.y(),
-        destination.width(),
-        destination.height());
+        destination.width() * devicePixelRatio(),
+        destination.height() * devicePixelRatio());
 }
 
 bool
@@ -372,7 +373,7 @@ OpenGLRenderer::onBlit(int buf_idx, int x, int y, int w, int h)
 
         /* Resize the texture */
         glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
-        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, source.width(), source.height(), 0, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, NULL);
+        glTexImage2D(GL_TEXTURE_2D, 0, (GLenum)QOpenGLTexture::RGBA8_UNorm, source.width(), source.height(), 0, (GLenum)QOpenGLTexture::BGRA, (GLenum)QOpenGLTexture::UInt32_RGBA8_Rev, NULL);
         glBindBuffer(GL_PIXEL_UNPACK_BUFFER, unpackBufferID);
     }
 
@@ -381,7 +382,7 @@ OpenGLRenderer::onBlit(int buf_idx, int x, int y, int w, int h)
 
     glPixelStorei(GL_UNPACK_SKIP_PIXELS, BUFFERPIXELS * buf_idx + y * ROW_LENGTH + x);
     glPixelStorei(GL_UNPACK_ROW_LENGTH, ROW_LENGTH);
-    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, w, h, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, NULL);
+    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, w, h, (GLenum)QOpenGLTexture::BGRA, (GLenum)QOpenGLTexture::UInt32_RGBA8_Rev, NULL);
 
     /* TODO: check if fence sync is implementable here and still has any benefit. */
     glFinish();
diff --git a/src/qt/qt_settingsmachine.ui b/src/qt/qt_settingsmachine.ui
index fabb52fe9..30f375f7e 100644
--- a/src/qt/qt_settingsmachine.ui
+++ b/src/qt/qt_settingsmachine.ui
@@ -202,6 +202,12 @@
    </item>
    <item>
     <widget class="QGroupBox" name="groupBox">
+     <property name="sizePolicy">
+      <sizepolicy hsizetype="Maximum" vsizetype="Preferred">
+       <horstretch>0</horstretch>
+       <verstretch>0</verstretch>
+      </sizepolicy>
+     </property>
      <property name="title">
       <string>Time synchronization</string>
      </property>